Готові списки джерел за темами / Textured silicon

Добірка наукової літератури з теми "Textured silicon"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Textured silicon"

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Komori, Junki, Tsuyoshi Sueto, and Kensuke Nishioka. "Control of the Texture Structure Size in Anisotropic Etching of Silicon." Advanced Materials Research 893 (February 2014): 174–77. http://dx.doi.org/10.4028/www.scientific.net/amr.893.174.

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Анотація:
Reflection losses of light at the silicon surface cause a reduction in conversion efficiency of silicon solar cell. There is anisotropic etching silicon to form a textured structure on the silicon surface by a simple wet process as a method of reducing the reflectivity. Further, miniaturization of the textured structure to the nanosize will improve the conversion efficiency by reducing the reflectivity. In this study, we formed texture structure of 1 μm size by applying the particles on a silicon surface as an etching mask.
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Chen, Jing Wei, Lei Zhao, Su Zhou, Hong Wei Diao, Ye Hua Tang, Bao Jun Yan, and Wen Jing Wang. "Preparation of Large Size Pyramidal Texture on N-Type Monocrystalline Silicon Using TMAH Solution for Heterojunction Solar Cells." Advanced Materials Research 476-478 (February 2012): 1815–19. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1815.

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Анотація:
Pyramidal texture is one traditional method to realize antireflection for c-Si solar cells, due to its low cost and simplicity. As one high efficiency silicon solar cell, amorphous/crystalline silicon heterojunction (SHJ) solar cell has attracted much attention all over the world. The heterojunction interface with very low defects and interface states is critical to the SHJ solar cell performance. In order to obtain high quality interface passivation by depositing a very thin intrinsic amorphous silicon layer on the textured Si conformally, large size pyramidal texture with no metal ion contamination is required. In this work, we utilized tetra-methyl ammonium hydroxide (TMAH) instead of NaOH in the alkaline etching to prepare pyramidal texture on N-type monocrystalline silicon to avoid the possible Na+ contamination. By optimizing the etching conditions, uniform large size pyramidal texture with pyramid size of about 10 μm was fabricated successfully. Furthermore, excellent antireflection performance was demonstrated on such textured Si surface. The average reflectance was lower than 10% in the visible and near infrared spectrum range. Such pyramidally textured Si wafers will be very suitable for SHJ solar cells.
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Hüpkes, Jürgen, Gabrielle C. E. Jost, Tsvetelina Merdzhanova, Jorj I. Owen, and Thomas Zimmermann. "Coupling and Trapping of Light in Thin-Film Solar Cells Using Modulated Interface Textures." Applied Sciences 9, no. 21 (November 1, 2019): 4648. http://dx.doi.org/10.3390/app9214648.

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Анотація:
Increasing the efficiency of solar cells relies on light management. This becomes increasingly important for thin-film technologies, but it is also relevant for poorly absorbing semiconductors like silicon. Exemplarily, the performance of a-Si:H/µc-Si:H tandem solar cells strongly depends on the texture of the front and rear contact surfaces. The rear contact interface texture usually results from the front surface texture and the subsequent absorber growth. A well-textured front contact facilitates light-coupling to the solar cell and light-trapping within the device. A variety of differently textured ZnO:Al front contacts were sputter deposited and subsequently texture etched. The optical performance of a-Si:H/µc-Si:H tandem solar cells were evaluated regarding the two effects: light-coupling and light-trapping. A connection between the front contact texture and the two optical effects is demonstrated, specifically, it is shown that both are induced by different texture properties. These findings can be transferred to any solar cell technologies, like copper indium gallium selenide (CIGS) or perovskites, where light management and modifications of surface textures by subsequent film growth have to be considered. A modulated surface texture of the ZnO:Al front contact was realized using two etching steps. Improved light-coupling and light-trapping in silicon thin-film solar cells lead to 12.5% efficiency.
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Jäger, Klaus, Johannes Sutter, Martin Hammerschmidt, Philipp-Immanuel Schneider, and Christiane Becker. "Prospects of light management in perovskite/silicon tandem solar cells." Nanophotonics 10, no. 8 (June 1, 2020): 1991–2000. http://dx.doi.org/10.1515/nanoph-2020-0674.

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Анотація:
Abstract Perovskite/silicon tandem solar cells are regarded as a promising candidate to surpass current efficiency limits in terrestrial photovoltaics. Tandem solar cell efficiencies meanwhile reach more than 29%. However, present high-end perovskite/silicon tandem solar cells still suffer from optical losses. We review recent numerical and experimental perovskite/silicon tandem solar cell studies and analyse the applied measures for light management. Literature indicates that highest experimental efficiencies are obtained using fully planar perovskite top cells, being in contradiction to the outcome of optical simulations calling for textured interfaces. The reason is that the preferred perovskite top cell solution-processing is often incompatible with usual micropyramidal textures of silicon bottom cells. Based on the literature survey, we propose a certain gentle nanotexture as an example to reduce optical losses in perovskite/silicon tandem solar cells. Optical simulations using the finite-element method reveal that an intermediate texture between top and bottom cell does not yield an optical benefit when compared with optimized planar designs. A double-side textured top-cell design is found to be necessary to reduce reflectance losses by the current density equivalent of 1 mA/cm2. The presented results illustrate a way to push perovskite/silicon tandem solar cell efficiencies beyond 30% by improved light management.
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Al Naimee, K., P. J. Scully, S. F. Abdalah, S. Liang, R. Meucci, and F. T. Arecchi. "Micro/Nano Surface Texturing in Si Using UV Femtosecond Laser Pulses." Materials Science Forum 792 (August 2014): 39–46. http://dx.doi.org/10.4028/www.scientific.net/msf.792.39.

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Анотація:
A fast laser texturing technique has been utilized to produce micro/nanosurface textures in Silicon by means of UV femtosecond laser. We have prepared good absorber surface for photovoltaic cells. The textured Silicon surface absorbs the incident light greater than the non-textured surface. The results show a photovoltaic current increase about 21.3% for photovoltaic cell with two-dimensional pattern as compared to the same cell without texturing.
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Yilbas, Bekir Sami, Abba Abubakar, Mubarak Yakubu, Hussain Al-Qahtani, and Abdullah Al-Sharafi. "Nanowall Textured Hydrophobic Surfaces and Liquid Droplet Impact." Materials 15, no. 5 (February 22, 2022): 1645. http://dx.doi.org/10.3390/ma15051645.

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Анотація:
Water droplet impact on nanowires/nanowalls’ textured hydrophobic silicon surfaces was examined by assessing the influence of texture on the droplet impact dynamics. Silicon wafer surfaces were treated, resulting in closely packed nanowire/nanowall textures with an average spacing and height of 130 nm and 10.45 μm, respectively. The top surfaces of the nanowires/nanowalls were hydrophobized through the deposition of functionalized silica nanoparticles, resulting in a droplet contact angle of 158° ± 2° with a hysteresis of 4° ± 1°. A high-speed camera was utilized to monitor the impacting droplets on hydrophobized nanowires/nanowalls’ textured surfaces. The nanowires/nanowalls texturing of the surface enhances the pinning of the droplet on the impacted surface and lowers the droplet spreading. The maximum spreading diameter of the impacting droplet on the hydrophobized nanowires/nanowalls surfaces becomes smaller than that of the hydrophobized as-received silicon, hydrophobized graphite, micro-grooved, and nano-springs surfaces. Penetration of the impacted droplet fluid into the nanowall-cell structures increases trapped air pressure in the cells, acting as an air cushion at the interface of the droplet fluid and nanowalls’ top surface. This lowers the droplet pinning and reduces the work of droplet volume deformation while enhancing the droplet rebound height.
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Bai, Linqing, Jianxin Sun, Pengcheng Zhang, and Zulfiqar Ahmad Khan. "Friction Behavior of a Textured Surface against Several Materials under Dry and Lubricated Conditions." Materials 14, no. 18 (September 11, 2021): 5228. http://dx.doi.org/10.3390/ma14185228.

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Анотація:
This paper reports research on the frictional behavior of a textured surface against several materials under dry and lubricated conditions, and this is aimed to provide design guidelines on the surface texturing for wide-ranging industrial applications. Experiments were performed on a tribo-tester with the facility of simulating A ball-on-plate model in reciprocating motion under dry, oil-lubricated, and water-lubricated conditions. To study the frictional behavior of textured SiC against various materials, three types of ball-bearing –elements, 52100 steel, silicon nitride (Si3N4), and polytetrafluoroethylene (PTFE), were used. Friction and wear performance of an un-textured surface and two types of widely used micro-scale texture surfaces, grooves and circular dimples, were examined and compared. The results demonstrated that the effect of surface textures on friction and wear performance is influenced by texture parameters and the materials of friction pairs. The circular-dimple texture and the groove texture, with certain texture parameters, played a positive role in improving friction and wear performance under specific operating conditions used in this research for SiC–steel and SiC–Si3N4 friction pairs; however, there was no friction and wear improvement for the textured SiC–PTFE friction pair. The results of this study offer an understanding and a knowledge base to enhance the performance of bearing elements in complex interacting systems.
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Atwater, Harry A., Carl V. Thompson, and Henry I. Smith. "Mechanisms for crystallographic orientation in the crystallization of thin silicon films from the melt." Journal of Materials Research 3, no. 6 (December 1988): 1232–37. http://dx.doi.org/10.1557/jmr.1988.1232.

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Анотація:
The dependence of the growth velocity on crystal orientation has been studied during crystallization of thin polycrystalline silicon films from the melt. Two types of growth velocity anisotropy have been observed. In the first, competitive growth between (100) textured seeds and seeds with (110) and (111) textures indicates that the relative growth velocities are ν(100) > ν(110)ν(111). It is postulated that this textural growth velocity anisotropy is a result of the differences in the interal energy of grains with different textures. This assumption, combined with the data, yields estimates of the interfacial energy anisotropy for the Si–SiO2 interface: γ(111) − γ(100) = 0.069 J/m2 and γ(110) − γ(100) = 0.012 J/m2. Another type of growth velocity anisotropy is responsible for the development of in-plane orientation in competitive growth between (100)-textured seeds. Simple models, which describe development of these two types of crystallographic orientation via anisotropies in growth velocity, agree well with the experimental results.
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Sai, Hitoshi, Takuya Matsui, Adrien Bidiville, Takashi Koida, Yuji Yoshida, Kimihiko Saito, and Michio Kondo. "Light Management Using Periodic Textures for Enhancing Photocurrent and Conversion Efficiency in Thin-Film Silicon Solar Cells." MRS Proceedings 1536 (2013): 3–15. http://dx.doi.org/10.1557/opl.2013.745.

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Анотація:
ABSTRACTPeriodically textured back reflectors with hexagonal dimple arrays are applied to thin-film microcrystalline silicon (μc-Si:H) solar cells for enhancing light trapping. The period and aspect ratio of the honeycomb textures have a big impact on the photovoltaic performance. When the textures have a moderate aspect ratio, the optimum period for obtaining a high short circuit current density (JSC) is found to be equal to or slightly larger than the cell thickness. If the cell thickness exceeds the texture period, the cell surface tends to be flattened and texture-induced defects are generated, which constrain the improvement in JSC. Based on these findings, we have fabricated optimized μc-Si:H cells achieving a high active-area efficiency exceeding 11% and a JSC of 30 mA/cm2.
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Fang, Zheng, Zhilong Xu, Tao Jang, Fei Zhou, and Shixiang Huang. "Standard Deviation Quantitative Characterization and Process Optimization of the Pyramidal Texture of Monocrystalline Silicon Cells." Materials 13, no. 3 (January 24, 2020): 564. http://dx.doi.org/10.3390/ma13030564.

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Анотація:
To quantitatively characterize the pyramidal texture of monocrystalline silicon cells and to optimize the parameters of the texturing process, the relative standard deviation Sh was proposed to quantitatively characterize the uniformity of the pyramidal texture. Referring to the definition and calculation of the standard deviation in mathematical statistics, Sh was defined as the standard deviation of the pyramid relative height hi after normalization of the pyramid height Hi of monocrystalline silicon wafer surfaces. Six different silicon cells, with different pyramidal textures, were obtained by applying different texturing times. The relationships between Sh and the photoelectric characteristics were analyzed. The feasibility of quantitatively characterizing the uniformity of the pyramidal texture using Sh was verified. By fitting the Sh curve, the feasibility of optimizing the texturing process parameters and predicting the photoelectric characteristics using Sh was verified. The experimental and analytical results indicate that, when the relative standard deviation Sh was smaller, the uniformity of the pyramidal texture obtained by texturing was better. The photoelectric conversion efficiency (PCE) of the silicon cells monotonically increased with decreasing Sh. The silicon cell obtained by texturing with 2% tetramethylammonium hydroxide (TMAH) solution for 18.1 min had a textured surface with a minimum of Sh, the reflectivity of the silicon cell reached its minimum value of 2.28%, and the PCE reached its maximum value of 19.76%.
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Більше джерел

Дисертації з теми "Textured silicon"

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Franta, Benjamin Andrew. "Fabrication techniques for femtosecond laser textured and hyperdoped silicon." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493373.

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Анотація:
This thesis presents a range of advances in the fabrication of femtosecond laser textured and hyperdoped silicon, a material platform with potential applications in photovoltaics, photodetectors, light-emitting diodes, lasers, and potentially other optoelectronic devices. After providing background and a review of the state of hyperdoped black silicon research in Chapter 1, we explore a range of fabrication approaches in Chapter 2, including laser texturing near and below the melting threshold of silicon, laser texturing and hyperdoping using scanned pulses, fabrication with thin films, control of the dopant concentration on textured substrates, and removal of surface material using chemical etching. In Chapter 3, we review the material microstructure of hyperdoped black silicon, including the morphology, the presence and origin of high-pressure material phases, and the incorporation of dopants from thin films. In Chapter 4, we explore the use of laser annealing to increase the crystallinity of hyperdoped black silicon, addressing a longstanding challenge in the field. We show that nanosecond laser annealing can be used on a wide variety of textures— from at least 10 micrometers in size to sub-micrometer in size—to produce high crystallinity and high optical absorptance simultaneously. Furthermore, we see that nanosecond laser annealing can reactivate the sub-bandgap absorptance after it has been deactivated by thermal annealing. We close Chapter 4 by exploring the use of fs laser pulses to anneal hyperdoped black silicon. Finally, in Chapter 5, we discuss advances in the thesis, outstanding challenges in the research field, and an outlook for applications.
Engineering and Applied Sciences - Applied Physics
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Lewis, Brian Wellington. "Silica nanosphere textured back reflectors for increased absorption in thin film amorphous silicon solar cells." [Ames, Iowa : Iowa State University], 2010. 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:1476317.

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Boesch, Ryan Paul. "SiO₂ nanosphere textured back reflectors for enhanced light trapping in amorphous and nanocrystalline silicon 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:1464182.

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Köppel, Grit [Verfasser], Christiane [Akademischer Betreuer] Becker, Bernd [Akademischer Betreuer] Rech, Bernd [Gutachter] Rech, Christiane [Gutachter] Becker, and Janez [Gutachter] Krč. "Liquid phase crystallized silicon on sinusoidal textured glass substrates : silicon material quality and absorption enhancement / Grit Köppel ; Gutachter: Bernd Rech, Christiane Becker, Janez Krč ; Christiane Becker, Bernd Rech." Berlin : Technische Universität Berlin, 2017. http://d-nb.info/1156177421/34.

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5

Мадан, Роман Григорович. "Органо-неорганічні гібриди на основі меланіну". Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/38762.

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Анотація:
Актуальність теми – інтерес до створення гібридних органічних та неорганічних тонкоплівкових сонячних елементів, що мають більш низьку вартість, ніж традиційні сонячні елементи. Метою роботи є визначення оптимальних технологічних умов створення органічно-неорганічних структур для фотовольтаїчного застосування. Предмет дослідження – органо-неорганічні структури на основі кремнію та меланіну.
The relevance of the topic is the interest in creating hybrid organic and inorganic thin-film solar cells, which have a lower cost than traditional solar cells. The aim of the work is to determine the optimal technological conditions for the creation of organic-inorganic structures for photovoltaic applications. The subject of research - organo-inorganic structures based on silicon and melanin.
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Almeida, Andressa da Nobrega. "Estudo da aplicação de um polímero em superfícies têxteis e desenvolvimento de novas texturas." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/100/100133/tde-06072015-212521/.

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Анотація:
O objetivo do presente trabalho foi pesquisar sobre a adequação e viabilização do processo de aplicação de um polímero, comercialmente conhecido como borracha de silicone, com o intuito de criar um novo conceito estético, a partir da vontade de produzir uma nova textura ou nova concepção de estrutura para substratos têxteis aplicados na alta costura. Primeiramente, investigou-se qual a melhor forma de adequação desta borracha e como ela se comporta em diferentes superfícies têxteis. Foram realizados ensaios para avaliar as condições de preparo da borracha de silicone, quanto ao volume de catalisador a ser utilizado de (0,75, 2,5 e 5 mL), temperatura (125oC a 180 oC) e tempo de secagem (30 a 90mim). Os materiais produzidos foram submetidos a testes de secagens a diferentes condições de temperatura para a realização dos trabalhos de moldagem. Além dos processos de secagem, foram realizados ensaios de laboratório como Calorimetria Exploratória Diferencial (DSC), Termogravimetria (TG), Espectroscopia de Absorção na Região do Infravermelho (FTIR) e citotoxicidade e Microscopia Eletrônica de Varredura (MEV) e Espectroscopia de Energia Dispersivo (EDS), a fim de caracterizar e conhecer as características dos materiais produzidos em termos físicos,químicos e biológicos,e ter estes estudos como aliados do processo criativo. Novos ensaios foram realizados ensaios com renda de poliamida, poliéster e algodão com aplicação da borracha e pigmentos preto,azul e amarelo. Os resultados mostraram que a melhor quantidade de catalisador foi entre 3 a 5 mL. A temperatura de secagem 150oC. Por meio da analise de Espectroscopia de Energia Dispersiva (EDS) foi verificado que a diferença da amostra com os controles foi a presença de silício. Foram desenvolvidas seis pecas, dois vestidos, duas saias, um acessório de cabelo e um sapato. Foram trabalhadas algumas possibilidades de utilização da borracha de silicone em materiais têxteis, os resultados foram promissores
The present work has its aim to investigate on the adaptation and to make it possible the process of application of a polymer, commercially known as a silicone rubber, in the context of creating a new aesthetic concept and the will to bring to textiles a new texture or new conception of structure to substrates. Firstly we investigated how best to adapt this rubber and how it behaves in different textile surfaces. Assays were performed to evaluate the conditions of preparation of the silicone rubber, the volume of the catalyst to be used (0.75, 2.5 and 5 ml), temperature (125°C to 180°C) and drying time (30 to 90 mim). The materials produced were subjected to drying tests at different temperature conditions for carrying out the molding work. Above the drying process, laboratory tests were conducted as Scanning Electron Microscopy-SEM and Analysis by Energy Dispersive Spectroscopy (EDS) in order to characterize and understand the characteristics of the materials on physical, chemical and biological terms, and these studies have as allies of the creative process. New tests were performed tests with income of polyamide, polyester and cotton with application of rubber and black pigments, blue and yellow. The results showed that the optimal amount of catalyst was from 3 to 5 ml. The drying temperature of 150°C. Through spectral analysis Energy Dispersive (EDS) it was found that the difference of the sample with the controls was the presence of silicon. Six pieces were developed, two dresses, two skirts, a hair accessory and a shoe. It was reached possibilities making use of silicone rubber textile materials, the results were promising
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Krzma, Adnan. "Comparative laboratory performance characterisation of silicone rubber textured insulators." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/91934/.

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Анотація:
Silicone rubber (SiR) outdoor insulators are increasingly being deployed in new AC and DC high voltage transmission systems thanks to their superior performance in wet-polluted conditions compared to traditional porcelain and glass insulators. However, in severely polluted environments, sustained discharge activities and dry band arcing due to surface contamination cause tracking, erosion, and the loss of hydrophobicity on the SiR insulator surface. This degradation can accelerate damage to the insulator surfaces, increasing the probability of a flashover and enduring insulator failure. This thesis presents an experimental study on the electric performance of polluted and aged outdoor SiR polymeric insulators using AC and DC voltages. The research involved an extensive review of the published literature and an investigation of the performance of SiR insulators subjected to different ambient conditions and identifies the modes where most failure and degradation occurred on SiR surfaces. Experimental investigations were carried out to compare the aging performance of two 11kV SiR insulator designs using a rotating wheel dip test under AC and positive DC excitations. A standard polymeric insulator design was used and compared with insulators that had a textured surface. Both insulator designs were fabricated in-house using a vacuum casting machine. Several electrical parameters were measured during the test to characterise the performance of each insulator. Dry band arcing activities were mainly observed on the trunk surface of the conventional profile. A decrease in hydrophobicity was measured on the tested surfaces, and tracking and erosion defects were also observed on both insulator designs. Leakage current measurements showed that drying and discharge activity was greater for a conventional insulator compared with the textured insulator, and more severe degradation appeared under positive DC tests than under AC. These studies showed that insulators with a textured design can improve the performance of SiR insulators against tracking and erosion under AC and positive DC excitations. The electric field and potential distributions along the leakage surface of the 11 kV SiR insulators under dry clean and wet polluted conditions were studied using finite element method COMSOL Multiphysics. The critical of high field regions on SiR surfaces were identified and the power dissipated in the pollution layer along insulator surface was calculated. This study showed useful information about surface heating, which could be used to predict of the formation of dry bands. An investigation of the pollution layer characterisation on conventional and textured pattern designs is described. Several tests were conducted to evaluate the behaviour of the insulator surfaces under different conditions. ESDD and NSDD parameters were measured for different materials, and evaluations for each design were also performed. Leakage conductance measurements on surface designs were determined, and the distribution trends of surface conductance were also characterised. Different rectangular SiR samples were assessed, and an improvement for reducing the pollutant deposition on textured surfaces was observed. In 4-shed insulators, the textured design showed comparable ESDD value with conventional profile. Textured designs also showed slower growth of the leakage current than the conventional design. Clean fog tests (based on a high voltage ramp test) were carried out to investigate the flashover performance of conventional and textured insulator designs. For different ranges of wetting and pollution severity conditions, the textured design showed an improvement in the flashover performance that could reach 16 % compared to the conventional surface. This indicates that the textured surface seems to be more effective under severe ambient conditions. It was also observed that the textured insulator design can improve the electrical performance of SiR insulators under AC and DC voltages.
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8

Ximello, Quiebras Jose Nestor [Verfasser]. "Wet chemical textures for crystalline silicon solar cells / Jose Nestor Ximello Quiebras." Konstanz : Bibliothek der Universität Konstanz, 2013. http://d-nb.info/1045840572/34.

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9

Damiani, Benjamin Mark. "Investigation of Light Induced Degradation in Promising Photovoltaic Grade Si and Development of Porous Silicon Anti-Reflection Coatings for Silicon Solar Cells." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5203.

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Анотація:
Cast multi-crystalline silicon substrates are used in more than 50% of the photovoltaic modules produced today. The random grain orientations of multi-crystalline silicon wafers inhibit the formation of an effective surface texturing using conventional techniques. The other main substrate used is single crystalline Czochralski wafers (~30% of the market share). Czochralski silicon material is known to suffer from the formation of a metastable defect under carrier injection, sometimes referred to as light induced degradation (LID). Light induced degradation in low-cost photovoltaic grade silicon is studied. Trap formation is shown to occur at temperatures above 200oC. Efficiency degradation reduced from 0.75% to 0.24% when the cell thickness was reduced from 378 to 157m. The presence of light induced degradation in ribbon silicon solar cells is documented for the first time in this thesis. Trap generation and annihilation are observed in high lifetime regions of multi-crystalline silicon samples. No degradation was observed over a 24-hour period at 25oC in high efficiency ribbon solar cells (>16%), but at an elevated temperature of ~75oC, appreciable efficiency degradation was observed. Czochralski silicon solar cells showed full degradation within 24 hours at 25o C. Part two of this thesis involves the development of a surface texturing suitable for all crystalline silicon. Only 6 to 10 seconds in a 200:1 HF to HNO3 solution at room temperature allows for the formation of an effective porous silicon anti-reflection coating. This resulted in a porous silicon anti-reflection coated solar cell efficiency of 15.3% on a float zone Si sample with an excellent fill factor (78.7%). The typical process used in the literature involves porous silicon etching as the final step in the solar cell fabrication sequence. The major problem associated with this process sequence is fill factor degradation. This problem was overcome in this research by porous silicon etching prior to cell processing. It is shown that incorporating an acid texture prior to porous silicon etching can improve the surface reflectance for cast multi-crystalline and Czochralski silicon samples. Solar cell efficiencies of 14.8% for Cz Si and 13.6% for cast mc-Si were achieved.
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Dewan, Rahul [Verfasser]. "Optics in thin-film silicon solar cells with periodic surface texture / Rahul Dewan." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2012. http://d-nb.info/1035209608/34.

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Книги з теми "Textured silicon"

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Basu, Sukumar. Crystalline silicon: Properties and uses. Rijeka: InTech, 2011.

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2

Fonash, S. J. Quarterly report January 1, 1985 - March 31, 1985 for the contract: Use of low energy hydrogen ion implants in high efficiency crystalline silicon solar cells. University Park, Pa: Pennsylvania State University, 1985.

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3

Page, J. H. R. Relationship between crystallographic textures in fully annealed silicon bearing non-oriented electrotechnical steels and magnetic parameters, in particular, energy loss in rotating machines. Luxembourg: Commission of the European Communities, 1986.

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4

Hans, Hausner, and United States. National Aeronautics and Space Administration., eds. Processing, texture and mechanical properties of sintered silicon carbide. Washington, DC: National Aeronautics and Space Administration, 1988.

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5

Electric arc and electrochemical surface texturing technologies. [Washington, D.C: National Aeronautics and Space Administration, 1997.

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6

Mee, Sarah, and Zoe Clift. Hand Therapy. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198757689.003.0002.

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Rehabilitation is a multidisciplinary, patient-centred, evidence-based process to promote healing, restore function, and promote independence. The physical and psychological and social consequences of the hand condition or injury have to be considered. Mobilization can be active or passive, supplemented by accessory movements and proprioceptive rehabilitation. Splinting may be static, serial static, static progressive, dynamic. Many materials are available. Oedema may be acute or chronic; it is treated with elevation, active movement, retrograde massage, compression, kinesiotaping, cold therapy, and contrast bathing. Scars may be mature or immature; keloid or hypertrophic. Management is generally empiric: massage, silicone, pressure therapy, steroid injections, and surgery all have roles. Hypersensitivity (allodynia, causalgia, dysaesthesia, hyperpathia, etc.) is treated with desensitization, graded textures, percussion, and mirror visual feedback. Stiffness is managed especially by prevention; movement, splinting, and surgery have a role. Pain is treated with medication, oedema control, acupuncture, TENS, education, psychological measures. Complex Regional Pain Syndrome has sensory, vasomotor, sudomotor, and trophic elements. Treatment includes medication, hand therapy, and occasionally surgery.
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Частини книг з теми "Textured silicon"

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Kumar, Amit, Daisy Verma, Hrishikesh Dhasmana, Vivek Kumar, Abhishek Verma, and V. K. Jain. "Textured Silicon Surface and Silicon Nanowires on Silicon Chip for Ammonia Sensing Application." In Springer Proceedings in Physics, 931–37. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97604-4_141.

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2

Sakka, Yoshio, Sho Saito, Atsushi Honda, and Tohru S. Suzuki. "Fabrication of Textured Alumina-Mullite-Silicon Carbide Nano-Composites." In Ceramic Transactions Series, 143–51. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118144145.ch23.

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Park, Dong Soo, Y. M. Kim, Byung Dong Hahn, and Chan Park. "Effect of the Sintering Additives on the Microstructure and the Properties of Textured Silicon Nitride." In Key Engineering Materials, 242–46. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-965-2.242.

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Zhu, Xin Wen, Tetsuo Uchikoshi, and Yoshio Sakka. "Aqueous Processing of Textured Silicon Nitride Ceramics by Slip Casting in a Strong Magnetic Field." In Progress in Powder Metallurgy, 1009–12. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.1009.

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5

Zhang, X., and M. Shao. "Textured silicon wafer prepared by reactive ion etching for anti-reflection in Si solar cells." In Advances in Energy and Environment Research, 75–78. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315212876-16.

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Sharma, Virender, Abhishek Verma, Vinod Kumar Jain, and Daisy Verma. "Antireflection Properties of Multi-crystalline Black Silicon with Acid Textured Surfaces Using Two Step Metal Assisted Chemical Etching." In Springer Proceedings in Physics, 23–28. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29096-6_3.

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7

Gong, Wen, Xiang Cheng Chu, Jing Feng Li, Zhi Lun Gui, and Long Tu Li. "Sol-Gel Process and Properties of Textured Pb(Zr, Ti)O3 Films on Silicon Wafers." In High-Performance Ceramics III, 239–42. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-959-8.239.

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8

Sharma, Mansi, Arti Rawat, S. Sudhakar, Sucheta Juneja, and Sushil Kumar. "Role of Plane and Textured TCO Surfaces in Enhancing the Efficiency of Thin Film Amorphous Silicon Solar cell: A Theoretical Approach." In Physics of Semiconductor Devices, 339–42. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03002-9_85.

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Kaiser, U., M. Kaiser, and R. Schindler. "Texture Etching of Multicrystalline Silicon." In Tenth E.C. Photovoltaic Solar Energy Conference, 293–94. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3622-8_74.

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Afer, H., N. Rouag, and Richard Penelle. "Comparison between the Growth Behaviour of the Small Goss Grains and that of the Large Matrix Grains in Silicon Steels. Influence of the Textured Cluster Presence." In Materials Science Forum, 525–30. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-975-x.525.

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Тези доповідей конференцій з теми "Textured silicon"

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Song, Ying, Hengyu Wang, and Min Zou. "PFPE Modified Silicon Nano-Textured Surfaces for Adhesion and Friction Reduction." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70144.

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This paper reports a new technique of producing hydrophobic surfaces with WCA as high as 147°. This technique consists of first generating nano-textures on a silicon surface via aluminum-induced crystallization (AIC) of amorphous silicon (a-Si) and then applying perfluoropolyether (PFPE) on the nano-textured surface (NTS). The resulting PFPE-modified NTS showed significant improvement on both surface hydrophobicity and tribological performances compared to a PFPE-modified smooth silicon surface.
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Wang, Kejia, Oki Gunawan, Naim Moumen, George Tulevski, Hisham Mohamed, Babak Fallah, Emanuel Tutuc, and Supratik Guha. "Wire-textured silicon solar cells." In 2010 35th IEEE Photovoltaic Specialists Conference (PVSC). IEEE, 2010. http://dx.doi.org/10.1109/pvsc.2010.5614554.

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3

Song, Ying, Rahul Premachandran Nair, and Min Zou. "Hydrophobic Surfaces Prepared by Aluminum-Induced Crystallization of Amorphous Silicon." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21558.

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This paper reports fabrication and understanding of hydrophobic silicon nano-textured surfaces produced by aluminum-induced crystallization (AIC) of amorphous silicon (a-Si). In this study, the effects of annealing temperature and duration on surface topography and wetting property were investigated. The results showed that surface wetting property directly correlates with the percentage area coverage by the nano-textures, which in turn was determined by the annealing conditions. The largest water contact angle (WCA) obtained from this research is 137°.
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Gupta, Mool C., Barada K. Nayak, and Vikram Iyengar. "Ultrafast Laser Textured Silicon Solar Cells." In 2008 MRS Fall Meetin. Materials Research Society, 2008. http://dx.doi.org/10.1557/proc-1123-p07-09.

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Sachenko, Anatoliy, Vitaliy Kostylyov, Viktor Vlasiuk, Igor Sokolovskyi, and Mykhaylo Evstigneev. "Optimization of Textured Silicon Solar Cells." In 2020 IEEE 47th Photovoltaic Specialists Conference (PVSC). IEEE, 2020. http://dx.doi.org/10.1109/pvsc45281.2020.9300877.

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Zang, Kai, Xun Ding, Xiao Jiang, Yijie Huo, Matthew Morea, Xiaochi Chen, Ching-Ying Lu, et al. "Surface textured silicon single-photon avalanche diode." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/cleo_si.2017.sm3k.2.

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7

Chong, T. K., T. P. White, and K. J. Weber. "Optical Modelling of MAE textured Nanoporous Silicon." In Optical Nanostructures and Advanced Materials for Photovoltaics. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/pv.2014.ptu2c.6.

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Turner, Stephen W., Lance Kam, Michael Isaacson, Harold G. Craighead, Donald H. Szarowski, James N. Turner, and W. Shain. "Cell attachment on microscopically textured silicon surfaces." In BiOS '97, Part of Photonics West, edited by Paul L. Gourley. SPIE, 1997. http://dx.doi.org/10.1117/12.269978.

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9

Wang, Hengyu, Li Cai, Dehua Yang, Thomas Wyrobek, and Min Zou. "Selective Surface Nano/Micro-Texturing by UV Assisted Low Temperature Crystallization of Amorphous Silicon." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63719.

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This paper presents a novel selective surface-texturing method as well as adhesion/stiction and friction studies of the selectively-textured surface. The selective surface-texturing was accomplished by ultraviolet (UV) assisted low temperature crystallization of amorphous silicon. Adhesion/stiction experiments on the nano/micro-textured and non-textured surface areas were performed using a diamond tip under controlled displacement profiles with different maximum indentation displacements. Friction experiments on the textured and non-textured surface areas were conducted using the same tip under various normal contact forces. The adhesion/stiction forces and coefficients of friction (COF) of the textured surface areas were found to be much smaller than those of non-textured surface areas.
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Wang, Hengyu, Li Cai, Dehua Yang, Thomas Wyrobek, and Min Zou. "Adhesion/Stiction and Friction Studies of Nano/Micro-Textured Surfaces Produced by Crystallization of Amorphous Silicon." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63723.

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This paper reports a new method of nano/micro surface-texturing and the results of systematic studies of adhesion/stiction and friction properties on the textured surfaces produced by this method. Nano/micro-textured surfaces with various roughnesses were produced by low temperature aluminum-induced crystallization of plasma enhanced chemical vapor deposited (PECVD) amorphous silicon. Adhesion/stiction experiments on these nano/microtextured and non-textured surfaces were performed using two diamond tips under predefined displacement profiles with different maximum indentation displacements. Friction experiments on the textured and non-textured surfaces were conducted using the same tips under various normal contact forces. The adhesion/stiction forces and coefficients of friction (COF) of the textured surfaces were found to be much smaller than those of non-textured surfaces.
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Звіти організацій з теми "Textured silicon"

1

ZAIDI, SALEEM H. Formation of Random, RIE-Textured Silicon Surfaces with Reduced Reflection and Enhanced Near IR Absorption. Office of Scientific and Technical Information (OSTI), April 2001. http://dx.doi.org/10.2172/780311.

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2

Collins, R. W., and C. R. Wronski. Real Time Optics of the Growth of Textured Silicon Films in Photovoltaics: Final Technical Report, 1 August 1999--12 August 2002. Office of Scientific and Technical Information (OSTI), October 2003. http://dx.doi.org/10.2172/15004830.

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