Bibliografie tematiche / Non-fullerene acceptor (NFA)

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Letteratura scientifica selezionata sul tema "Non-fullerene acceptor (NFA)"

Autore: Grafiati

Pubblicato: 2 novembre 2024

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Articoli di riviste sul tema "Non-fullerene acceptor (NFA)"

Jiang, Yuanyuan, e Xiaozhang Zhu. "High-Performance Ternary Organic Solar Cells Enabled by Synergizing Fullerene and Non-fullerene Acceptors". Organic Materials 03, n. 02 (31 marzo 2021): 254–76. http://dx.doi.org/10.1055/a-1472-3989.

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Abstract (sommario):

With the development of the non-fullerene acceptors (NFAs), the use of ternary organic photovoltaic devices based on a fullerene acceptor and a NFA is now widespread, and the merits of both acceptor types can be fully utilized. However, the effective approach of enhancing device performance is adjusting the charge dynamics and the thin-film morphology of the active layer via introducing the second acceptor, which would significantly impact the open-circuit voltage, the short-circuit current, and the fill factor, thus strongly affecting device efficiency. The functions of the second acceptor in a ternary organic solar cell with a fullerene acceptor and a NFA are summarized here. These include a broader absorption spectrum; formation of a cascade energy level or energy transfer; modified thin-film morphology including phase separation, effects on crystallinity, size, and purity of domain; and vertical distribution along with improved charge dynamics like exciton dissociation and charge transport, collection, and recombination. Then, we discuss the hierarchical morphology in ternary solar cells, which may benefit device performance, and the outlook of the ternary device.

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Im, Chan, Sang-Woong Kang, Jeong-Yoon Choi e Jongdeok An. "Comparing Donor- and Acceptor-Originated Exciton Dynamics in Non-Fullerene Acceptor Blend Polymeric Systems". Polymers 13, n. 11 (28 maggio 2021): 1770. http://dx.doi.org/10.3390/polym13111770.

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Non-fullerene type acceptors (NFA) have gained attention owing to their spectral extension that enables efficient solar energy capturing. For instance, the solely NFA-mediated absorbing region contributes to the photovoltaic power conversion efficiency (PCE) as high as ~30%, in the case of the solar cells comprised of fluorinated materials, PBDB-T-2F and ITIC-4F. This implies that NFAs must be able to serve as electron donors, even though they are conventionally assigned as electron acceptors. Therefore, the pathways of NFA-originated excitons need to be explored by the spectrally resolved photovoltaic characters. Additionally, excitation wavelength dependent transient absorption spectroscopy (TAS) was performed to trace the nature of the NFA-originated excitons and polymeric donor-originated excitons separately. Unique origin-dependent decay behaviors of the blend system were found by successive comparing of those solutions and pristine films which showed a dramatic change upon film formation. With the obtained experimental results, including TAS, a possible model describing origin-dependent decay pathways was suggested in the framework of reaction kinetics. Finally, numerical simulations based on the suggested model were performed to verify the feasibility, achieving reasonable correlation with experimental observables. The results should provide deeper insights in to renewable energy strategies by using novel material classes that are compatible with flexible electronics.

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Hasenburg, Franziska H., Kun-Han Lin, Bas van der Zee, Paul W. M. Blom, Denis Andrienko e Gert-Jan A. H. Wetzelaer. "Ambipolar charge transport in a non-fullerene acceptor". APL Materials 11, n. 2 (1 febbraio 2023): 021105. http://dx.doi.org/10.1063/5.0137073.

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Charge transport is one of the key factors in the operation of organic solar cells. Here, we investigate the electron and hole transport in the non-fullerene acceptor (NFA) IT-4F, by a combination of space-charge-limited current measurements and multiscale molecular simulations. The electron and hole mobilities are fairly balanced, amounting to 2.9 × 10−4 cm2 V−1 s−1 for electrons and 2.0 × 10−5 cm2 V−1 s−1 for holes. Orientational ordering and electronic couplings facilitate a better charge-percolating network for electrons than for holes, while ambipolarity itself is due to sufficiently high electron affinity and low ionization energy typical for narrow-gap NFAs. Our findings provide a molecular-level understanding of the balanced hole and electron transport in an archetypical NFA, which may play a key role in exciton diffusion and photogenerated hole transfer in organic solar cells.

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Datt, Ram, Harrison Ka Hin Lee, Michael Spence, Matthew Carnie e Wing Chung Tsoi. "High performance non-fullerene organic photovoltaics under implant light illumination region". Applied Physics Letters 122, n. 14 (3 aprile 2023): 143906. http://dx.doi.org/10.1063/5.0144861.

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Implantable biomedical electronics, such as pacemakers, drug pumps, cochlear implants, cardioverter-defibrillators, and neurological stimulators, help humans to overcome various diseases. Currently, the power supply for these devices relies on small-size batteries, and replacement of the battery is required after running for a period of time. Recharging the battery could be a way to prolong the replacement cycle. Organic photovoltaics (OPVs) are a class of emerging photovoltaics, which are now becoming more practical with recently developed device and material engineering. The absorption of OPVs using a non-fullerene acceptor (NFA) could be extended to the near-infrared (NIR) region to cover the transmission window of human skin between 650 and 1000 nm. Motivated by this, we conducted a study of NFA-based OPVs under light irradiation of wavelengths of 650–1000 nm for implants. The devices using donor (PTB7-Th) and NFA (IEICO-4F) as the active material have strong absorption in the NIR region and obtained a promising power conversion efficiency (PCE) of 14.3% under the implant light illumination, compared to 8.11% when using a benchmark fullerene derivative-based acceptor (PC71BM). Importantly, the PCE and power density of the NFA-based OPVs are significantly higher than the previously reported fullerene-based OPVs devices. This study shows that NFA-based OPVs have high potential for future applications in powering implants, e.g., through charging batteries.

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Yang, Qing, Xuan Liu, Shuwen Yu, Zhendong Feng, Lixin Liang, Wei Qin, Youyang Wang et al. "Hydroxylated non-fullerene acceptor for highly efficient inverted perovskite solar cells". Energy & Environmental Science 14, n. 12 (2021): 6536–45. http://dx.doi.org/10.1039/d1ee02248b.

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A hydroxylated non-fullerene acceptor (NFA) is developed to modify the interface between the perovskite and the electron transport layer in inverted perovskite solar cells (i-PSCs), achieving a record PCE of 22.09% among reported i-PSCs employing NFAs.

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Zhang, Jie, Yunjie Xiang e Shaohui Zheng. "From Y6 to BTPT-4F: a theoretical insight into the influence of the individual change of fused-ring skeleton length or side alkyl chains on molecular arrangements and electron mobility". New Journal of Chemistry 45, n. 27 (2021): 12247–59. http://dx.doi.org/10.1039/d1nj01515j.

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Grant, Trevor M., Chloé Dindault, Nicole A. Rice, Sufal Swaraj e Benoît H. Lessard. "Synthetically facile organic solar cells with >4% efficiency using P3HT and a silicon phthalocyanine non-fullerene acceptor". Materials Advances 2, n. 8 (2021): 2594–99. http://dx.doi.org/10.1039/d1ma00165e.

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We demonstrate organic photovoltaic devices with extremely low synthetic complexity by pairing poly(3-hexithiophene) (P3HT) with a novel non-fullerene acceptor (NFA) bis(tri-n-propylsilyl oxide) silicon phthalocyanine ((3PS)₂-SiPc).

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Lu, Qiuchen, Ming Qiu, Meiyu Zhao, Zhuo Li e Yuanzuo Li. "Modification of NFA-Conjugated Bridges with Symmetric Structures for High-Efficiency Non-Fullerene PSCs". Polymers 11, n. 6 (2 giugno 2019): 958. http://dx.doi.org/10.3390/polym11060958.

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As electron acceptors, non-fullerene molecules can overcome the shortcomings of fullerenes and their derivatives (such as high cost, poor co-solubility, and weak light absorption). The photoelectric properties of two potential non-fullerene polymer solar cells (PSCs) PBDB-T:IF-TN (PB:IF) and PBDB-T:IDT-TN (PB:IDT) are studied by density functional theory (DFT) and time-dependent DFT (TD-DFT). Based on the optimized structure of the ground state, the effects of the electron donor (D) and electron acceptor (A) (D/A) interfaces PBDB-T/IF-TN (PB/IF) and PBDB-T/IDT-TN (PB/IDT) are studied by a quantum-chemical method (QM) and Marcus theory. Firstly, for two non-fullerene acceptors (NFAs) IF-TN and IDT-TN, the NFA IDT-TN has better optical absorption ability and better electron transport ability than IF-TN. Secondly, for the D/A interfaces PB/IF and PB/IDT, they both have high optical absorption and electron transfer abilities, and PB/IDT has better optical absorption and lower exciton binding energy. Finally, some important parameters (open-circuit voltage, voltage loss, fill factor, and power conversion efficiency) are calculated and simulated by establishing the theoretical model. From the above analysis, the results show that the non-fullerene PSC PB:IDT has better photoelectric characteristics than PB:IF.

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Li, Yang, Wei Huang, Dejiang Zhao, Lu Wang, Zhiqiang Jiao, Qingyu Huang, Peng Wang, Mengna Sun e Guangcai Yuan. "Recent Progress in Organic Solar Cells: A Review on Materials from Acceptor to Donor". Molecules 27, n. 6 (10 marzo 2022): 1800. http://dx.doi.org/10.3390/molecules27061800.

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In the last few decades, organic solar cells (OSCs) have drawn broad interest owing to their advantages such as being low cost, flexible, semitransparent, non-toxic, and ideal for roll-to-roll large-scale processing. Significant advances have been made in the field of OSCs containing high-performance active layer materials, electrodes, and interlayers, as well as novel device structures. Particularly, the innovation of active layer materials, including novel acceptors and donors, has contributed significantly to the power conversion efficiency (PCE) improvement in OSCs. In this review, high-performance acceptors, containing fullerene derivatives, small molecular, and polymeric non-fullerene acceptors (NFAs), are discussed in detail. Meanwhile, highly efficient donor materials designed for fullerene- and NFA-based OSCs are also presented. Additionally, motivated by the incessant developments of donor and acceptor materials, recent advances in the field of ternary and tandem OSCs are reviewed as well.

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Yang, Chenyi, Shaoqing Zhang, Junzhen Ren, Mengyuan Gao, Pengqing Bi, Long Ye e Jianhui Hou. "Molecular design of a non-fullerene acceptor enables a P3HT-based organic solar cell with 9.46% efficiency". Energy & Environmental Science 13, n. 9 (2020): 2864–69. http://dx.doi.org/10.1039/d0ee01763a.

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Più fonti

Tesi sul tema "Non-fullerene acceptor (NFA)"

Diarra, Cheick Oumar. "Modélisation par dynamique moléculaire ab initio du transport des excitons et du transport thermique dans les semiconducteurs organiques pour la collecte d'énergie". Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAD013.

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L'exciton joue un rôle clé dans le fonctionnement des cellules solaires organiques (OSCs). Comprendre sa dynamique dans les semiconducteurs organiques est essentiel, notamment pour améliorer la longueur de diffusion, une propriété déterminante pour la performance des hétérojonctions planaires, envisagées comme une alternative plus stable aux hétérojonctions en volume (BHJ). Dans la première partie de cette thèse, nous avons développé une approche méthodologique robuste et polyvalente pour évaluer la longueur de diffusion de l'exciton dans les semiconducteurs organiques. Cette approche, basée sur AIMD-ROKS, a été validée avec succès dans le cas du polymère P3HT. Elle a également été appliquée à l'accepteur NFA O-IDTBR, révélant des longueurs de diffusion prometteuses, mais encore insuffisantes pour les hétérojonctions planaires. Dans la deuxième partie de la thèse, le transfert de chaleur dans les semiconducteurs organiques a été exploré, élément crucial pour la performance des dispositifs thermoélectriques. Ces études se sont concentrées sur le P3HT, un matériau utilisé en thermoélectricité. Dans un premier temps, la conductivité thermique au sein des chaînes de P3HT a été étudiée, révélant l'influence de la longueur des chaînes de polymère. Ensuite, les transferts de chaleur entre ces chaînes ont également été examinés
The exciton plays a central role in the functioning of organic solar cells (OSCs). Understanding its dynamics in organic semiconductors is essential, particularly to optimize the diffusion length, a key property for the performance of planar heterojunctions, which are considered as a potentially more stable alternative to bulk heterojunctions (BHJ) in certain contexts. In the first part of this thesis, we developed a robust and versatile methodological approach to evaluate the exciton diffusion length in organic semiconductors. This method, based on AIMD-ROKS, was successfully validated for the P3HT polymer. It was also applied to the NFA O-IDTBR acceptor, revealing promising diffusion lengths, though still insufficient for planar heterojunctions. The second part of the thesis explores heat transfer in organic semiconductors, a crucial element for the performance of thermoelectric devices. These studies focused on P3HT, a material used in thermoelectricity. First, the thermal conductivity within P3HT chains was studied, revealing the influence of polymer chain length. Then, heat transfers between these chains were also examined

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Althobaiti, Wejdan. "Photophysics of Poly(3-hexylthiophene):Non-Fullerene Acceptor Organic Solar Cells". Thesis, 2021. http://hdl.handle.net/10754/670709.

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Insight into the relationship between the Ionization Energy (IE) offsets between donor and acceptor materials and the performance of the organic solar cells (OSC) could improve the charge generation efficiency. Charge generation can proceed through two different paths in Bulk Heterojunction (BHJ) based OSCs which are electron transfer from donor to acceptor and hole transfer from acceptor to donor. Electron transfer can be controlled by electron affinities and hole transfer can be controlled by ionization energies. In this work, large IE offsets were investigated in poly(3-hexylthiophene-2,5-diyl)(P3HT):Non Fullerene Acceptor (NFA) based OSCs by fabricating and characterizing devices, also conducting several experiments to optimize the processing conditions for the devices. These results provide an overview of the charge transfer and IE offsets dependence, also a general picture of the photophysics in P3HT:NFAs based OSCs. Moreover, using wide bandgap polymer donor which has shallow IE such as P3HT with low-bandgap NFAs may provide sufficient IE offsets between donor and acceptors enabled us to reach the inverted Marcus regime. In this regime, the electron transfer rate decreases upon decreasing the charge transfer (CT) state energy compared to the exciton energy. The decrease of the internal quantum efficiency (IQE) upon increasing the IE offset suggests that we are in that regime.

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Atti di convegni sul tema "Non-fullerene acceptor (NFA)"

Moons, Ellen, Vanja Blazinic, André Johansson, Cleber Marchiori, Leif K. E. Ericsson e C. Moyses Araujo. "Photo-oxidation of a non-fullerene acceptor polymer". In NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfasc.2021.009.

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Shoaee, Safa. "Pathways To Reduced-Recombination in Fullerene and Non-Fullerene Acceptor Solar Cells". In NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfasc.2021.005.

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Seifrid, Martin, Steve Halaby, Michael Martynowycz, Ziyue Zhu, Sergei Tretiak, Andriy Zhugayevych e Tamir Gonen. "Microcrystal Electron Diffraction for Molecular Design of Functional Non-Fullerene Acceptor Structures". In NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfasc.2021.006.

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Müller, Christian. "Glass Transition Temperature and Thermal Stability of Non-Fullerene Acceptor Based Solar Cells". In NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfasc.2021.014.

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Gorenflot, Julien, Frédéric Laquai, Yuliar Firdaus, Catherine De Castro, George Harrison, Jafar Khan, Anastasia Markina et al. "Ultrafast Energy Transfer Triggers Ionization Energy Offset Dependence of Quantum Efficiency in Low-bandgap Non-fullerene Acceptor Solar Cells". In NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfasc.2021.002.

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Kim, Prof Ji-Seon. "Key Impact of Molecular Structure and Orientation of Non-Fullerene Acceptors on Organic Photoconversion Devices". In Solar Energy and Light-Emitting Devices. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/seled.2023.stu1d.2.

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Abstract (sommario):

Organic photoconversion devices such as organic photovoltaic (OPV) and photodetectors (OPD) are attracting significant attention due to their potential to be lightweight, flexible, non-toxic, and compatible with large-scale manufacturing. In particular, the development of the new small molecule-based non-fullerene acceptors (NFAs) has enabled OPVs to show remarkable improvements in device efficiency. Although promising, there is still a lack of clear understanding of the impact of molecular structure and orientation of NFAs on photophysical processes critical for device performance.

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Chen, Hongzheng. "Low Cost and Highly Efficient Organic Solar Cells by Designing New Non-Fullerene Acceptors". In NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfasc.2021.016.

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