Relevant bibliographies by topics / Solar cells- Light absorption

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Solar cells- Light absorption'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Solar cells- Light absorption"

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Guolong Li, Guolong Li, Hongyu Zhen Hongyu Zhen, Zhuoyin Huang Zhuoyin Huang, Kan Li Kan Li, Weidong Shen Weidong Shen, and Xu Liu Xu Liu. "Silver clusters insert into polymer solar cell for enhancing light absorption." Chinese Optics Letters 10, no. 1 (2012): 012401–12403. http://dx.doi.org/10.3788/col201210.012401.

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Peter Amalathas, Amalraj, and Maan Alkaisi. "Nanostructures for Light Trapping in Thin Film Solar Cells." Micromachines 10, no. 9 (September 17, 2019): 619. http://dx.doi.org/10.3390/mi10090619.

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Thin film solar cells are one of the important candidates utilized to reduce the cost of photovoltaic production by minimizing the usage of active materials. However, low light absorption due to low absorption coefficient and/or insufficient active layer thickness can limit the performance of thin film solar cells. Increasing the absorption of light that can be converted into electrical current in thin film solar cells is crucial for enhancing the overall efficiency and in reducing the cost. Therefore, light trapping strategies play a significant role in achieving this goal. The main objectives of light trapping techniques are to decrease incident light reflection, increase the light absorption, and modify the optical response of the device for use in different applications. Nanostructures utilize key sets of approaches to achieve these objectives, including gradual refractive index matching, and coupling incident light into guided modes and localized plasmon resonances, as well as surface plasmon polariton modes. In this review, we discuss some of the recent developments in the design and implementation of nanostructures for light trapping in solar cells. These include the development of solar cells containing photonic and plasmonic nanostructures. The distinct benefits and challenges of these schemes are also explained and discussed.
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He, Jinna, Chunzhen Fan, Junqiao Wang, Yongguang Cheng, Pei Ding, and Erjun Liang. "Plasmonic Nanostructure for Enhanced Light Absorption in Ultrathin Silicon Solar Cells." Advances in OptoElectronics 2012 (November 5, 2012): 1–8. http://dx.doi.org/10.1155/2012/592754.

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The performances of thin film solar cells are considerably limited by the low light absorption. Plasmonic nanostructures have been introduced in the thin film solar cells as a possible solution around this issue in recent years. Here, we propose a solar cell design, in which an ultrathin Si film covered by a periodic array of Ag strips is placed on a metallic nanograting substrate. The simulation results demonstrate that the designed structure gives rise to 170% light absorption enhancement over the full solar spectrum with respect to the bared Si thin film. The excited multiple resonant modes, including optical waveguide modes within the Si layer, localized surface plasmon resonance (LSPR) of Ag stripes, and surface plasmon polaritons (SPP) arising from the bottom grating, and the coupling effect between LSPR and SPP modes through an optimization of the array periods are considered to contribute to the significant absorption enhancement. This plasmonic solar cell design paves a promising way to increase light absorption for thin film solar cell applications.
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Jiang, Weiwen, and Xi Chen. "Light absorption enhancement in ultrathin perovskite solar cells using plasmonic light trapping and bionic anti-reflection coating." AIP Advances 12, no. 6 (June 1, 2022): 065106. http://dx.doi.org/10.1063/5.0092059.

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Perovskite solar cells have attracted much attention due to their easy fabrication, low cost, and high photoelectric conversion efficiency. To reduce pollution, the absorption layer thickness of perovskite solar cells should be reduced. Moreover, the ultrathin layer can effectively depress the electron–hole recombination in the process of carrier transfer. However, the light absorption of the ultrathin perovskite solar cell is not satisfactory. The promising pathways to design absorption-enhanced ultrathin perovskite solar cells are plasmonic light trapping and anti-reflection coating. In this paper, we propose a design for the light absorption enhancement of ultrathin solar cells with a 100 nm perovskite layer through the integration of plasmonic structure arrays and moth-eye textured anti-reflection coatings. Due to the plasmonic scattering and the antireflection effect, an optimized light absorption enhancement of 41% has been achieved, compared with a 100 nm blank layer. In this case, a silver cylindrical array with a radius of 100 nm, a height of 120 nm, and a coverage of 12% is embedded into the rear-side hole transport layer. Inverted pyramids of the moth-eye textures with a base length of 180 nm and a depth of 125 nm are located on the front surface of the antireflection coating and further improve the perovskite light absorption. The absorbance of the 100 nm layer is dramatically raised to 72.51%, which is comparable to that of a 300 nm perovskite layer (72.86%). The simulation results pave the way for the realization of environmental-friendly and high-performance perovskite optoelectronic devices.
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Tahersima, Mohammad Hossein, and Volker J. Sorger. "Strong Photon Absorption in 2-D Material-Based Spiral Photovoltaic Cells." MRS Advances 1, no. 59 (2016): 3915–21. http://dx.doi.org/10.1557/adv.2016.19.

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ABSTRACTAtomically thin transition-metal dichalcogenides (TMD) hold promise for making ultrathin-film photovoltaic devices with a combination of excellent photo-absorption and mechanical flexibility. However, reported absorption for photovoltaic cells based on TMD materials is still just a few percent of the incident light due to their sub-wavelength thickness leading to low cell efficiencies. Here we discuss that taking advantage of the mechanical flexibility of two dimensional (2D) materials by rolling their Van der Waal heterostructures such as molybdenum disulfide (MoS2)/graphene (Gr)/hexagonal boron nitride (hBN) to a spiral solar cell, leads to strong light matter interaction allowing for solar absorptions up to 90%. The optical absorption of a 1 µm-long hetero-material spiral cell consisting of the aforementioned hetero stacks is about 50% stronger compared to a planar MoS2 cell of the same thickness; although the volumetric absorbing material ratio is only 6%. We anticipate these results to provide guidance for photonic structures that take advantage of the unique properties of 2D materials in solar energy conversion applications.
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Karim, Mohammad Rezaul, Muhammad Ali Shar, and Syed Abdullah. "Mixed Dyes for Dye-sensitized Solar Cells Applications." Current Nanoscience >15, no. 5 (July 19, 2019): 501–5. http://dx.doi.org/10.2174/1573413715666190325165613.

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Background: Energy crisis is a vital issue worldwide and it will be increased tremendously in future. Alternative energy sources have been sought for the betterment of the future world. Solar energy is an alternative energy resource with plenty of opportunities. To make user- friendly and cheaper solar cells, dye-sensitized solar cells are tried to develop in this aspect. Objective: Single dye is not good enough to capture a wide range of solar light. The blending of different dyes is an alternative approach to harvest a wider range of solar lights on solar cells. Here, N719 and IR dyes were utilized to get UV-VIS and NIR ranges of solar lights in dye-sensitized solar cells. Methods: Dye-sensitized solar cells (DSSCs) were fabricated by using mixed dyes with various combinations of N719 (dye A) and IR dyes (dye B). The mixed dyes solutions were adsorbed on titanium dioxide (TiO2) and revealed significant light absorption & photosensitization compared with the individual dye solutions. The DSSCs fabricated with more percentage of IR dyes exhibited the best sensitization and broader spectrum. Results: The light absorption spectrum of the blended dyes solutions was confined peaks resultant of both N719 and IR dyes. The maximum efficiencies of 7.91% and 7.77% were obtained with 70% and 80% of IR dyes, respectively. Conclusion: Both N719 and IR mixed dyes solar cells were fabricated successfully for the first time. The relevant reasons behind the working of N719 and IR mixed dyes solar cells have been discussed. It was also noted that only IR dyes sensitized cells did not function under the simulated sunlight.
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Nakayama, Keisuke, Katsuaki Tanabe, and Harry A. Atwater. "Plasmonic nanoparticle enhanced light absorption in GaAs solar cells." Applied Physics Letters 93, no. 12 (September 22, 2008): 121904. http://dx.doi.org/10.1063/1.2988288.

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Kupec, Jan, Ralph L. Stoop, and Bernd Witzigmann. "Light absorption and emission in nanowire array solar cells." Optics Express 18, no. 26 (December 15, 2010): 27589. http://dx.doi.org/10.1364/oe.18.027589.

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Alaeian, Hadiseh, Ashwin C. Atre, and Jennifer A. Dionne. "Optimized light absorption in Si wire array solar cells." Journal of Optics 14, no. 2 (January 12, 2012): 024006. http://dx.doi.org/10.1088/2040-8978/14/2/024006.

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Yang, Jianjun, Jiaxuan Liu, Yaxin Li, Xiaobao Yu, Zichuan Yi, Zhi Zhang, Feng Chi, and Liming Liu. "A DSSC Electrolyte Preparation Method Considering Light Path and Light Absorption." Micromachines 13, no. 11 (November 9, 2022): 1930. http://dx.doi.org/10.3390/mi13111930.

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The electrolyte is one of the key components of dye-sensitized solar cells’ (DSSC) structure. In this paper, the electrolyte formulation of a new DSSC with external photoanode structure was studied. Based on the idea that the electrolyte should match the light absorption and light path, iodine series electrolytes with different concentrations were configured and used in the experiment. The results showed that the external photoanode structure solar cells assembled with titanium electrode had the best photoelectric conversion ability when the concentration of I2 was 0.048 M. It achieved the open circuit voltage of 0.71 V, the short circuit current of 8.87 mA, and the filling factor of 57%.
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Dissertations / Theses on the topic "Solar cells- Light absorption"

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Yang, Qingyi. "Broadband light absorption enhancement in organic solar cells." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/54.

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The aim of this thesis was to undertake a comprehensive research to study the broadband light absorption enhancement in organic solar cells (OSCs) with different nano-structures, thereby improving short-circuit current density and efficiency. Absorption enhancement in OSCs having different photonic structures, compared to the control planar cell configuration, was analyzed and studied using the optical admittance analysis and finite-difference time-domain (FDTD) method. After a brief overview of the latest progresses made in OSCs, the basic optical principles of light scattering, surface plasmon polaritons (SPPs), localized surface plasmon resonance (LSPR), diffraction effect and waveguide mode, that had been employed for light trapping in OSCs, are discussed. Optical admittance analysis reveals that light absorption in inverted OSCs, based on polymer blend layer of P3HT:PCBM, is always greater than the conventional geometry OSCs fabricated using an ITO/PEDOT:PSS anode. The inverted bulk heterojunction OSCs, made with a pair of an ultrathin Al-modified ITO front cathode and a bi-layer MoO3/Ag anode, exhibited a superior power conversion efficiency (PCE) of 4.16%, which is about 13% more efficient than a control normal OSC. It is shown that the reverse configuration allows improving charge collection at cathode/blend interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test. Light absorption enhancement in ZnPc:C60-based OSCs, made with substrates having different structures, for example, surface-modified Ag nanoparticles and 1-D photonic structures, was analyzed. The effect of an ultra-thin plasma-polymerized fluorocarbon film (CFx)-modified Ag nanoparticles ii (NPs)/ITO anode on the performance of OSCs was optimized through theoretical simulation and experimental optimization. This work yielded a promising PCE of 3.5 ± 0.1%, notably higher than that with a bare ITO anode (2.7±0.1%). The work was extended to study the performance of OSCs made with CFx-modified Ag NPs/ITO/polyethylene terephthalate (PET) substrate. The resulting flexible OSCs had a relatively high PCE of 3.1±0.1%, comparable to that of structurally identical OSCs fabricated on ITO-coated glass substrate (PCE of 3.5±0.1%). The distribution of the sizes of the Ag NPs, formed by the thermal evaporation, was over the range from 2.0 nm to 10 nm. The results reveal that the localized surface plasmon resonance, contributing to the broadband light absorption enhancement in the organic photoactive layer, was strongly influenced by the size of Ag NPs and the dielectric constant of the surrounding medium. A new OSC structure incorporating a transparent PMMA/ITO double layer grating electrode was also developed. 1-D PMMA/ITO double layer grating, fabricated using nano-imprinting and low processing temperature ITO sputtering method, has a period of 500 nm. Light absorption in grating OSCs under TM, TE and TM/TE hybrid polarizations was calculated using FDTD simulation in the wavelength range from 400 nm to 800 nm. We profiled the electric field distribution and analyzed the structural requirement for confining the waveguide modes in the organic photoactive layer. The effects of the periodicity and the pitch size on light scattering, simultaneous excitation of horizontally propagating SPPs, LSPR and the waveguide modes for light harvesting in grating OSCs were analyzed. The efficiency enhancement in the grating OSCs (PCE 3.29%) over the planar control device (PCE 2.86%) is primarily due to the increase in the short-circuit current density from 11.93 mA/cm2 to 13.57 mA/cm2 (13.7% enhancement). The theoretical results agree with the experimental findings in showing that the improved performance in grating OSCs is attributed to the absorption enhancement in the active layer
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Fang, Liping. "Enhancing light absorption in silicon solar cells by fluorescent molecules." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/370511/.

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This project aims to harness photon transport in planar solar converters via fluorescent molecules to enhance light absorption in silicon and hence reduce the material requirements and the cost of crystalline silicon solar cells. To accomplish this aim two approaches has been investigated: concentrating the far field radiation of the excited fluorescent molecules on a small area of silicon solar cell by using a fluorescent solar collector; directly injecting the excitonic energy of the excited fluorescent molecules to the waveguide modes in a proximal thin crystalline silicon solar cell via near field interactions. An analytical model has been developed to characterise photon reabsorption in fluorescent solar collectors. This model is able to predict the spectrum of the incident photon flux on the optically coupled edge solar cell, which is not easy to measure experimentally. In the limit of high reabsorption, a useful simple expression has been found for the reabsorption probability limit, which only depends on the étendue of the photon flux emitted at the edge of the collector, the absorption coefficient of the dye molecule, and the refractive index of the collector matrix. Perceiving the solar cell as a waveguide, the highly oscillating behaviour of the quantum efficiency of a 200 nm thick crystalline silicon solar cell has been linked to the waveguide modes supported by the thin solar cell, by studying the analytical properties of the solar cell absorbance in the complex plain of the wavenumber of light. Efficient energy injection into a 25 nm thick thin crystalline silicon film has been demonstrated by studying molecular fluorescence and energy transfer of a carbocyanine dye deposited as Langmuir-Blodgett monolayers at different distance to the surface of copper, bulk crystalline silicon and 25 nm thick crystalline silicon films. Via the time correlated single photon counting technique, the dependence of fluorescence lifetime on the distance to the 25 nm thick crystalline silicon films has been found to fit quantitatively with an analytical expression for the injection rate of waveguide modes or simply the photon tunnelling rate from an excited molecule to a nearby thin waveguide obtained by a complex variable analysis.
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Lan, Weixia. "Light harvesting and charge collection in bulk heterojunction organic solar cells." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/318.

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As a clean and non-exhaustible energy source, solar energy is becoming increasingly important in reducing energy prices and influencing the global climate change. Compared to the traditional inorganic solar cells, conjugated polymer-based organic solar cells (OSCs) have shown much promise as an alternative photovoltaic technology for producing solar cells on large scale at low-cost. However, despite the rapid progresses made in the development of new donor materials, fullerene derivatives and hybrid small molecule/polymer blends, the efficiency and stability of OSCs are still limitations on the potential applications. The performance of OSCs is primarily hampered by the limited light absorption, caused by the mismatch between light absorption depth and carrier transport scale, low carrier mobility and unstable electrode/organic interfacial properties. Improved utilization of light in solution-processed OSCs via different light trapping schemes is a promising approach. The feasibility of light trapping using surface plasmonic structures and textured surfaces to confine light more efficiently into OSCs has been demonstrated. However, plasmon excitations are localized only in the vicinity of metal/organic interface, while the absorption enhancement due to the textured surfaces improves light trapping irrespective of the wavelength. A generic approach towards improving light harvesting in the organic active layer thinner than optical absorption length is one of the key strategies to the success of OSCs. The aim of this PhD project is to undertake a comprehensive study to analyze broadband and omnidirectional light absorption enhancement in bulk heterojunction (BHJ) OSCs, to understand the dynamics of charge transport, charge recombination, charge collection, and to develop solutions to improve the stability of OSCs. In this work, the broadband light absorption enhancement in solution-processed BHJ OSCs is realized by incorporating 2-D photonic structures in the active layer, formed using a nano-imprinting method. The performance of photonic-structured OSCs and planar control cells, fabricated with the blend of poly[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-bA] dithiophene-2,6-diyl] [3-fluoro-2-[(2ethylhexyl) carbonyl] thieno[3,4-b]-thiophenediyl] (PTB7): [6,6]-phenyl-C70-butyric-acid-methyl-ester (PC70BM) is analyzed. By introducing the photonic structures with 500 nm structure period, the performance of structured OSCs is optimized by adjusting the structure height in the active layer. With the comparison of the current densityvoltage (JV) characteristics, the incident photon to charge carrier efficiency (IPCE) spectra and also the finite-difference time-domain (FDTD) calculated electric field distributions, our results reveal that the photonic structures allow improving light absorption in PTB7:PC70BM layer, especially in the long wavelength region. It is shown that the photonic-structured OSCs possess a 6.15 % increase in power conversion efficiency (PCE) and a 7.53 % increase in short circuit current density (JSC) compared to that of a compositionally identical planar control cell. Light absorption in the 2-D photonic-structured OSCs is a function of the photonic structures and the optical properties of the active layer. The correlation between the choice of the photonic structures and the enhanced spectral response in photonic-structured OSCs is analysed systematically using theoretical simulation and experimental optimization. It is found that the integrated absorption of the active layer decreases slightly with increase in the period of the photonic structures. The results reveal that the photonic-structured OSCs exhibit a stronger absorption enhancement over a broader range of the angle of incident light. The incorporation of the appropriate periodic nano-structures in the active layer is apparently favourable for efficient cell operation as compared to light absorption in the planar control cells made with the same blend system, which decreases rapidly with an increase in the angle of the incident light. Omnidirectional and broadband light absorption enhancement observed in photonic-structured OSCs agrees well with the theoretical simulation. More than 11% increase in the PCE of photonic-structured OSCs is obtained compared to that of an optimized planar control cell, caused mainly by the absorption enhancement in the active layer. 2-D photonic structures allow achieving broadband absorption enhancement in OSCs over a wider range of the angle of the incident light from -45 deg to +45 deg with respect to the normal to the cell surface. For example, the higher light absorption in the active layer of photonic-structured OSCs, integrated over the visible light wavelength range from 380 nm to 780 nm, changes slightly from 70.1% (normal) to 67.7% (45 deg), remaining 96.6% of the absorption in the cells at the normal incidence. While for the control planar OSC, the integrated absorption follows a faster decrease from 66.2% (normal) to 62.2% (45 deg), revealing a quicker reduction in the absorption of the cells at an angle of the incident light away from the normal incidence. In addition to the absorption enhancement, charge transport, recombination and collection are also prominent factors for the efficient operation of OSCs. Thus, it is crucial to improve the understanding of these important processes and their impacts on the cell performance in order to design optimized device architectures. The charge recombination processes, the distribution of charge density under different operation conditions and charge collection at the organic/electrode interfaces in PTB7:PC70BM-based OSCs are studied systematically using a combination of theoretical calculation, transient photocurrent (TPC) measurements, morphology analyses and device optimization. The charge transport and recombination properties in the BHJ OSCs are investigated using the photo-induced charge extraction by linearly increasing voltage (Photo-CELIV) method. Combined with light intensity-dependent J--V characteristic and TPC measurements, it is shown that the use of the ZnO cathode interlayer has a profound effect on enhancing charge collection efficiency and thereby improving in the overall performance of OSCs. The origin of the improvement in the cell performance is mainly associated with improved electrical properties. The TPC results reveal that the presence of the ZnO interlayer helps to prevent the unfavourable interfacial exciton dissociation for achieving efficient charge collection at the active layer/electrode interface. Light intensity-dependent J--V characteristics and the photo-CELIV results support the findings in showing that the charge recombination at the organic/cathode interface can be effectively suppressed by inserting a thin ZnO cathode interlayer, leading to a significant improvement in the charge collection efficiency. A comprehensive study on the degradation mechanisms of solution-processed BHJ. OSCs has been performed. It is manifested that the suppression in bi-molecular recombination and enhancement in charge mobility, achieved through appropriate electrode modification, is one of the effective approaches for achieving stable and performance reproducible OSCs. The effect of the solution-processed anode interlayer, e.g. a mixture of MoO3 and Au nanoparticles (MoO3:Au NPs), on the performance of BHJ OSCs is also examined, with the aim to replace the acidic and hygroscopic poly(3,4-ethylenedioxylenethiophene): polystyrene sulfonate (PEDOT:PSS) hole extraction layer (HEL). A 14.3% enhancement in the PCE of OSCs with an anode interlayer of MoO3:Au NPs (7.78%) is obtained compared to that of the structurally identical devices with a pristine MoO3-based interlayer (6.72%), due to the simultaneous improvements in both JSC and fill factor (FF). The accelerated aging tests for as-prepared structurally identical OSCs fabricated with different HELs were carried out in the ambient condition. It is shown that the solution-processed MoO3:Au NPs and pristine MoO3 interlayers are superior to the frequently-used PEDOT:PSS HEL for efficient operation over the long-term. PCE of the MoO3-based OSCs maintains about 40% of their initial value, while a catastrophic failure in the control devices with a PEDOT:PSS HEL is observed after the accelerated aging test under the same condition, with a high relative humidity of 90% at room temperature for 180 min. The degradation behavior of different OSCs performed in the accelerated aging test correlates well with light-intensity JV characteristic and TPC measurements. The outcomes of this work help to the creation of device knowledge and process integration technologies for realization of high performance solution-processed OSCs. It is anticipated that the adoption of the affordable organic photovoltaic technology as one of the clean energy sources will contribute to the preservation of the environment.
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Dunbar, Ricky. "Using metallic nanostructures to trap light and enhance absorption in organic solar cells." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-142241.

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Ellaboudy, Ashton. "ENHANCEMENT OF LIGHT ABSORPTION EFFICIENCY Of SOLAR CELL USING DUAL." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/672.

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In this research we study the effect of adding a single diffraction grating on top of a solar cell. We simulated the square diffraction grating, as well as triangular diffraction grating. The single square grating showed more favorable results, achieved 330% power improvement compared to 270% power improvement in the single triangular grating case. We simulated a triangle/triangle (top-bottom) and triangular/rectangular (top-bottom) grating cases. The Triangular grating achieved higher light absorption compared to rectangular grating. The best top grating was around 200nm grating period. We realized solar cell efficiency improvement about 42.4% for the triangular rectangular (top-bottom) grating. We studied the light transmitted power in a silicon solar cell using double diffraction triangular nano-grating. We simulated the solar cell behavior as it absorbs sunlight through its structure in various cases, results showed 270% increase of the weighted transmitted power when the top grating period (At) varies from 300nm to 800nm, and the bottom grating period (Ab) is at 500nm. We finally studied the effect of changing the location of the diffraction gratings with respect to the solar cell. We were able to increase the light efficiency by 120%. The study showed that the power absorbed by the solar cell is not sensitive to the grating location.
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Curtin, Benjamin Michael. "Photonic crystal back-reflectors for light management and enhanced absorption in a-Si:H solar cells." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1468075.

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Beyer, Beatrice. "Architectural Approaches for the Absorption Layer and their Impact on Organic Solar Cells." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-133594.

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This study focuses on the architectural modification of pin-type small-molecule organic solar cells, in particular on the absorption layer and its influence on the key solar cell parameters, such as short circuit current density, fill factor and open circuit voltage. Three different approaches have been applied to improve the match between the solar spectrum and the spectral sensitivity of organic solar cells. In the first part, deposition parameters such as substrate temperature, gradient strength and (graded) absorption layer thickness are evaluated and compared to organic solar cells with homogeneously deposited absorption layers. Moreover, the gradient-like distribution of the absorption layer is characterized optically and morphological effects have been extensively studied. In order to isolate the origin of the efficiency improvement due to the graded architecture, voltage-dependent spectral response measurements have been performed and gave new insights. The second part concentrates on the efficient in-coupling of converted UV light, which is usually lost because of the cut off properties of organic light in-coupling layers. Via Förster resonance energy transfer, the absorbed UV light is re-emitted as red light and contributes significantly to higher short circuit current densities. The correlation between doping concentration, simple stack architecture modifications and the performance improvement is duly presented. In the third and last part, the impact of tri-component bulk heterojunction absorption layers is investigated, as these have potential to broaden the sensitivity spectrum of organic solar cells without chemical modification of designated absorber molecules. Along with the possibility to easily increase the photocurrent, an interesting behavior of the open circuit voltage has been observed. Knowledge about the impact of slight modifications within the solar stack architecture is important in order to be able to improve the device efficiency for the production of cheap and clean energy.
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Müller, Thomas Christian Mathias [Verfasser], Uwe [Akademischer Betreuer] Rau, and Christoph [Akademischer Betreuer] Brabec. "Light absorption and radiative recombination in thin-film solar cells / Thomas Christian Mathias Müller ; Uwe Rau, Christoph Brabec." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1128598019/34.

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Dunbar, Ricky [Verfasser], and Lukas [Akademischer Betreuer] Schmidt-Mende. "Using metallic nanostructures to trap light and enhance absorption in organic solar cells / Ricky Dunbar. Betreuer: Lukas Schmidt-Mende." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1022318829/34.

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Yin, Guanchao [Verfasser], Martina [Akademischer Betreuer] Schmid, Walter [Akademischer Betreuer] Reimers, and John [Akademischer Betreuer] Banhart. "Preparation of ultra-thin CuIn1-xGaxSe2 solar cells and their light absorption enhancement / Guanchao Yin. Gutachter: John Banhart ; Walter Reimers ; Martina Schmid. Betreuer: Martina Schmid ; Walter Reimers." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/107524921X/34.

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Books on the topic "Solar cells- Light absorption"

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United States. National Aeronautics and Space Administration., ed. Enhancing optical absorption in InP and GaAs utilizing profile etching. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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Luque, Antonio, and Alexander Virgil Mellor. Photon Absorption Models in Nanostructured Semiconductor Solar Cells and Devices. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14538-9.

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K, Dutta S., and Saha H, eds. Texturization and light trapping in silicon solar cells. New York: Nova Science Publishers, 2009.

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Solanki, Chetan Singh, and Hemant Kumar Singh. Anti-reflection and Light Trapping in c-Si Solar Cells. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4771-8.

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W, Kerslake Thomas, Scheiman David A, and NASA Glenn Research Center, eds. Analysis of direct solar illumination on the backside of space station solar cells. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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Williams, Michael D. Influence of refractive index and solar concentration on optical power absorption in slabs. Hampton, Va: Langley Research Center, 1988.

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Li, Jinmin. Solid state lighting and solar energy technologies: 12-14 November 2007, Beijing, China. Edited by Society of Photo-optical Instrumentation Engineers, Zhongguo guang xue xue hui, Nihon Kōgakkai (Ōyō Butsuri Gakkai), Zhongguo ke xue ji shu xie hui, Guo jia zi ran ke xue ji jin wei yuan hui (China), and China. Guo jia ke xue ji shu bu. Bellingham, Wash: SPIE, 2008.

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Principles of solar cells, LEDs, and diodes: The role of the PN junction. Chichester, West Sussex, U.K: Wiley, 2011.

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Photonics, and Optoelectronics Meetings (2009 Wuhan China). Photonics and Optoelectronics Meetings (POEM) 2009: Solar cells, solid state lighting, and information display technologies : 8-10 August 2009, Wuhan, China. Bellingham, Wash: SPIE, 2009.

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Larsen, A. Nylandsted. Production of solar cells on the basis of low cost silicon by application of ion implantation and light-induced transient heating. Luxembourg: Commission of the European Communities, 1985.

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Book chapters on the topic "Solar cells- Light absorption"

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Bisquert, Juan. "Light Absorption, Carrier Recombination, and Luminescence." In The Physics of Solar Cells, 23–42. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/b22380-2.

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Bajpai, Manisha, Ritu Srivastava, and Ravindra Dhar. "Effect of Plasmonic Enhancement of Light Absorption on the Efficiency of Polymer Solar Cell." In Springer Proceedings in Physics, 315–17. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29096-6_42.

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Cheng, Hsin-Hung, Shih-Wen Chen, Jen-You Chu, Ding-Zheng Lin, Tsung-Dar Cheng, Yi-Ping Chen, Ying-Yu Chang, et al. "Light Trapping for Solar Cells." In High-Efficiency Solar Cells, 449–73. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01988-8_14.

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Miskovsky, N. M., P. H. Cutler, P. B. Lerner, A. Mayer, B. G. Willis, D. T. Zimmerman, G. J. Weisel, and T. E. Sullivan. "Nanoscale Rectennas with Sharp Tips for Absorption and Rectification of Optical Radiation." In Rectenna Solar Cells, 135–61. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-3716-1_7.

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Borchert, Holger. "Absorption and Photoluminescence Spectroscopy." In Solar Cells Based on Colloidal Nanocrystals, 119–27. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04388-3_8.

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Holman, Zachary, and Mathieu Boccard. "Light Management in Silicon Solar Cells." In Photovoltaic Solar Energy, 136–49. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118927496.ch14.

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Ohkita, Hideo, and Shinzaburo Ito. "Exciton and Charge Dynamics in Polymer Solar Cells Studied by Transient Absorption Spectroscopy." In Organic Solar Cells, 103–37. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-4823-4_5.

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Bisquert, Juan. "Blackbody Radiation and Light." In The Physics of Solar Cells, 1–22. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/b22380-1.

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Seifert, Gerhard, Isolde Schwedler, Jens Schneider, and Ralf B. Wehrspohn. "Light Management in Solar Modules." In Photon Management in Solar Cells, 323–46. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527665662.ch12.

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Schropp, R. E. I., H. Meiling, W. G. J. H. M. Sark, J. Stammeijer, J. Bezemer, and W. F. Weg. "Absorption Optimization of Amorphous Silicon Solar Cells." In Tenth E.C. Photovoltaic Solar Energy Conference, 1087–90. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3622-8_278.

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Conference papers on the topic "Solar cells- Light absorption"

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Gu, S. Q., P. C. Taylor, and S. Nitta. "Light-induced changes in subband absorption in a-Si:H using photoluminescence absorption spectroscopy." In Amorphous silicon materials and solar cells. AIP, 1991. http://dx.doi.org/10.1063/1.41022.

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Sepeai, Suhaila, M. Y. Sulaiman, Saleem H. Zaidi, and Kamaruzzaman Sopian. "Enhanced light absorption in bifacial solar cells." In 2012 10th IEEE International Conference on Semiconductor Electronics (ICSE). IEEE, 2012. http://dx.doi.org/10.1109/smelec.2012.6417086.

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Smay, Joshua, Ola Rashwan, James Then, and Darien Perez. "Investigation of Parasitic Absorption in Back Contact of CdTe Solar Cells." In ASME 2018 12th International Conference on Energy Sustainability collocated with the ASME 2018 Power Conference and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/es2018-7533.

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Thin film solar cells (TFSC) differ from the conventional wafer solar cell panels in that they are a fraction of the thickness, hence they boast reduced material costs, lighter weight, and possible flexibility. To improve their light-trapping and absorption efficiency, manufacturers currently use nanometer scale texturing. When manufacturing nano textured thin film solar cells in the substrate configuration, the back reflector is also textured. It has been observed that a textured back reflector leads to parasitic light absorption in silicon solar cells. This occurrence reduces the back reflector effectiveness, and thus reduces absorption in the absorber layer and overall efficiency. However, there is little to no similar research done for thin film (CdTe/CdS) solar cells devices. In this work, wave optical analyses of thin film CdTe/CdS solar cells with and without nano texturing on the metal back reflectors were simulated using ANSYS ANSOFT High Frequency Structural Simulator (HFSS). The optical analyses yielded percentage absorptions for unit cells with four absorber thicknesses range between 250- to 1000 nm, with and without a textured back reflector over six wavelengths range from 360nm to 860 nm, and with 3 different back contact metals (Au, Ag, and Al). It was noted that the textured back contacts show a substantial increase in the absorption in the active CdTe layer in the infrared range. Additionally, back reflector texturing increases the parasitic absorption in the metal back reflector layer as well, especially with ultrathin absorber layer. It was also found that additional parasitic absorption due to a textured back reflector has less of an impact on absorption as the active absorber thickness increases to 500 nm, 750 nm, or 1000 nm. Finally, silver (Ag) as back contact outperforms both aluminum (Al) and gold (Au). This finding might be crucial to solar cell manufacturers because it could possibly be an overlooked factor in achieving higher efficiencies for relatively thin cells.
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Liu, Fang, Di Qu, Qi Xu, Wanlu Xie, and Yidong Huang. "Plasmonic Enhanced Light Absorption of Solar Cells with Metal Nanoparticles." In Optical Instrumentation for Energy and Environmental Applications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/e2.2011.jwe11.

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Duché, D., L. Escoubas, J. J. Simon, C. Gourgon, C. Masclaux, Ph Torchio, J. Le Rouzo, and F. Flory. "Photonic crystals for improving light absorption in organic solar cells." In SPIE OPTO, edited by Alexandre Freundlich and Jean-Francois F. Guillemoles. SPIE, 2012. http://dx.doi.org/10.1117/12.909091.

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Maho, Anthony, Nathan Daem, Michaël Lobet, Pierre Piron, Alexandre Mayer, Pierre Colson, Jérôme Loicq, Catherine Henrist, Rudi Cloots, and Jennifer Dewalque. "Photonic Structuration of Perovskite Solar Cells Towards Enhanced Light Absorption." In International Conference on Hybrid and Organic Photovoltaics. València: Fundació Scito, 2022. http://dx.doi.org/10.29363/nanoge.hopv.2022.052.

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Li, Rongheng, and Ben Q. Li. "Numerical Modeling of Nanostructure-Enhanced Solar Cells." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38628.

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This paper presents a computational study of nanostructure-enhanced solar cells. The computer model is developed based on the FDTD solution of the Maxwell equations describing the light propagation in thin film solar cells. With the model, a combination of Ag nanoparticle arrays at the top, Ag nanoparticle embedded into absorption layer and nanograting structures at the bottom of a thin film solar cell is studied. Each nanostructure is known to be capable of enhancing the solar light absorption to a certain degree, with the effect of metal particles coming primarily from the light scattering, the embedded particles from the reflection and that of back reflector from light trapping and reflection. The preliminary data from model simulation illustrate that with an appropriate combination and arrangement of these nanostructures, an increase in both short and long wavelength range can be achieved, thereby overcoming the shorting comings of each of the nanostructures when applied alone.
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Yuanpei, Xu, and Xuan Yimin. "Light-Harvesting and Photon Management in GaAs Solar Cells for Photovoltaic-Thermoelectric Hybrid Systems." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6357.

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The utilization of solar energy in photovoltaics is limited due to the band gap of the materials. Hence, photovoltaic–thermoelectric hybrid system was proposed to utilize solar energy in the full spectrum of AM1.5G. On this basis, a novel design of GaAs solar cell is proposed in this paper for the full spectrum absorption in the cell structure, which consists of an ultra-thin GaAs layer with nanocones on the surface and a nanogrid–AZO–Ag back contact. The Finite Difference Time Domain method is used to analyze the full spectrum absorption features for TE and TM polarizations over the incident angles varying from 0° to 60°. The designed structure shows high absorption in the full spectrum. For GaAs layer, it is shown that the solar usable energy for GaAs solar cells in 300–900nm is absorbed by GaAs almost perfectly due to the anti–reflection property of the nanocone array. The absorbed energy in the back contact in the longer wavelengths over 900nm is due to the Fabry-Perot and the localized plasmonic resonances. The structure can collect full-spectrum incident photons efficiently in GaAs solar cells for the application of photovoltaic–thermoelectric hybrid system.
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Jia, Zhenhui, Changhong Liu, and Ben Q. Li. "Nanoparticle-Enhanced Plasmonic Light Absorption in Thin-Film Silicon Solar Cells." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36182.

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In this paper, numerical simulations are performed for different configurations of plasmonic and dielectric scatters for the purpose of enhancing light absorption in Si solar cells. The numerical model is developed on the basis of FDTD solution of the transient Maxwell equations. Results show that for Ag nanoparticles, the optimal light absorption is achieved with a particle radius of 75 nm and particle spacing of 3r to 5r. For dielectric SiO2 nanoparticles, a closely packed configuration with particle size of 50 nm in radius yields the optimal light absorption. The enhancement for both optimal cases is similar, measured by the short currents. Simulations with SiO2 nanoparticles embedded into Si at various different positions were conducted and results suggest that when the SiO2 particle buried half-way into the Si substrate, the light absorption enhancement is better than that with the particles placed at the top or embedded completely inside the Si layer. Analysis of a new design, with Ag atop the surface of and SiO2 inside the Si layer, was also performed. The results suggest that such a combined configuration produces the best light absorption enhancement among all those studied, achieving an 80% improvement compared with bare thin film.
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Hu, Lu, Xiaoyuan Chen, and Gang Chen. "Surface-Plasmon Enhanced Near-Bandgap Light Absorption in Silicon Photovoltaics." In ASME 2008 3rd Energy Nanotechnology International Conference collocated with the Heat Transfer, Fluids Engineering, and Energy Sustainability Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/enic2008-53056.

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One key challenge for silicon-based solar cells is the weak absorption of long-wavelength photons near the bandgap (1.1eV) due to the indirect bandgap of silicon. A large fraction of the AM 1.5 solar spectrum falls into a regime (0.7 μm – 1.1 μm) where silicon does not absorb light well. The capture of these long-wavelength photons imposes a particular problem to the thin-film silicon solar cells. For this reason, thin-film silicon solar cells often incorporate some forms of light trapping mechanisms.
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Reports on the topic "Solar cells- Light absorption"

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Atwater, Harry. Solar Cells from Earth-Abundant Semiconductors with Plasmon-Enhanced Light Absorption. Office of Scientific and Technical Information (OSTI), April 2012. http://dx.doi.org/10.2172/1131343.

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Russo, Johnny A., William Ray, Marc S. Litz, and Charlie Wu. Low Illumination Light (LIL) Solar Cells: Indoor and Monochromatic Light Harvesting. Fort Belvoir, VA: Defense Technical Information Center, October 2015. http://dx.doi.org/10.21236/ada625514.

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John, Sajeev. Light Trapping, Absorption and Solar Energy Harvesting by Artificial Materials. Office of Scientific and Technical Information (OSTI), June 2014. http://dx.doi.org/10.2172/1167261.

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Timmons, Michael L. Light-Weight, Low Cost, High-Efficiency Solar Cells Space Planar Arrays. Fort Belvoir, VA: Defense Technical Information Center, January 1996. http://dx.doi.org/10.21236/adb209013.

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Guo, Tzung-Fang. The Organic-Oxide Interfacial Layer on the Studies of Organic Electronics (Light-Emitting Diodes and Solar Cells). Fort Belvoir, VA: Defense Technical Information Center, October 2008. http://dx.doi.org/10.21236/ada488098.

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Xiao, Teng. Modifying the organic/electrode interface in Organic Solar Cells (OSCs) and improving the efficiency of solution-processed phosphorescent Organic Light-Emitting Diodes (OLEDs). Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1048522.

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Low-Cost Nano-Patterning Process Makes Millions of Holes in Silver Film, Boosting Light-Capturing Qualities of Solar Cells (Fact Sheet). Office of Scientific and Technical Information (OSTI), February 2011. http://dx.doi.org/10.2172/1009295.

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