共查询到20条相似文献,搜索用时 15 毫秒
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Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells 下载免费PDF全文
Xiaokai Li Marina Mariano Lyndsey McMillon‐Brown Jing‐Shun Huang Matthew Y. Sfeir Mark A. Reed Yeonwoong Jung André D. Taylor 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(48)
Mechanical fragility and insufficient light absorption are two major challenges for thin flexible crystalline Si‐based solar cells. Flexible hybrid single‐walled carbon nanotube (SWNT)/Si solar cells are demonstrated by applying scalable room‐temperature processes for the fabrication of solar‐cell components (e.g., preparation of SWNT thin films and SWNT/Si p–n junctions). The flexible SWNT/Si solar cells present an intrinsic efficiency ≈7.5% without any additional light‐trapping structures. By using these solar cells as model systems, the charge transport mechanisms at the SWNT/Si interface are investigated using femtosecond transient absorption. Although primary photon absorption occurs in Si, transient absorption measurements show that SWNTs also generate and inject excited charge carriers to Si. Such effects can be tuned by controlling the thickness of the SWNTs. Findings from this study could open a new pathway for designing and improving the efficiency of photocarrier generation and absorption for high‐performance ultrathin hybrid SWNT/Si solar cells. 相似文献
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Enhanced Light Scattering and Trapping Effect of Ag Nanowire Mesh Electrode for High Efficient Flexible Organic Solar Cell 下载免费PDF全文
Byung‐Yong Wang Tae‐Hee Yoo Ju Won Lim Byoung‐In Sang Dae‐Soon Lim Won Kook Choi Do Kyung Hwang Young‐Jei Oh 《Small (Weinheim an der Bergstrasse, Germany)》2015,11(16):1905-1911
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Silicon Solar Cells: Graphenized Carbon Nanofiber: A Novel Light‐Trapping and Conductive Material to Achieve an Efficiency Breakthrough in Silicon Solar Cells (Adv. Mater. 5/2015) 下载免费PDF全文
Xi Chen Baohua Jia Boyuan Cai Jia Fang Ze Chen Xiaodan Zhang Ying Zhao Min Gu 《Advanced materials (Deerfield Beach, Fla.)》2015,27(5):848-848
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陷光结构在GaAs薄膜太阳电池中的应用 总被引:1,自引:0,他引:1
陷光结构由于其独特的光学特性,在光伏器件中发挥的作用越来越重要。目前硅基太阳电池中陷光结构的应用很常见,然而在GaAs薄膜太阳电池中陷光结构的报道并不多。详细介绍了陷光结构的原理及其在GaAs薄膜电池中的研究现状和应用情况。综述了GaAs薄膜太阳能电池中常用的三类陷光结构:正面陷光结构(包括纳米颗粒、纳米线、纳米锥等)、背面陷光结构(如镜面背反射层)以及混合陷光结构。大量研究表明,陷光结构的使用可以进一步提高GaAs薄膜电池的光电转换效率,一定程度上达到降低电池生产成本的目的。 相似文献
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Heterojunction Hybrid Solar Cells by Formation of Conformal Contacts between PEDOT:PSS and Periodic Silicon Nanopyramid Arrays 下载免费PDF全文
Xixi Wang Zhaolang Liu Zhenhai Yang Jian He Xi Yang Tianbao Yu Pingqi Gao Jichun Ye 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(15)
Surface nanotexturing with excellent light‐trapping property is expected to significantly increase the conversion efficiency of solar cells. However, limited by the serious surface recombination arising from the greatly enlarged surface area, the silicon (Si) nanotexturing‐based solar cells cannot yet achieve satisfactory high efficiency, which is more prominent in organic/Si hybrid solar cells (HSCs) where a uniform polymer layer can rarely be conformably coated on nanotextured substrate. Here, the HSCs featuring advanced surface texture of periodic upright nanopyramid (UNP) arrays and hole‐conductive conjugated polymers, poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), are investigated. The tetramethylammonium hydroxide etching is used to smooth the surface morphologies of the Si‐UNPs, leading to reduced surface defect states. The uniform Si‐UNPs together with silane chemical‐incorporated PEDOT:PSS solution enable the simultaneous realization of excellent broadband light absorption as well as enhanced electrical contact between the textured Si and the conducting polymer. The resulting PEDOT:PSS/Si HSCs textured with UNP arrays show a promising power conversion efficiency of 13.8%, significantly higher than 12.1% of the cells based on the‐state‐of‐the‐art surface texture with random pyramids. These results provide a viable route toward shape‐controlled nanotexturing‐based high‐performance organic/Si HSCs. 相似文献
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A Semitransparent Inorganic Perovskite Film for Overcoming Ultraviolet Light Instability of Organic Solar Cells and Achieving 14.03% Efficiency 下载免费PDF全文
Weijie Chen Jingwen Zhang Guiying Xu Rongming Xue Yaowen Li Yinhua Zhou Jianhui Hou Yongfang Li 《Advanced materials (Deerfield Beach, Fla.)》2018,30(21)
Organic solar cells (OSCs) can be unstable under ultraviolet (UV) irradiation. To address this issue and enhance the power conversion efficiency (PCE), an inorganic‐perovskite/organic four‐terminal tandem solar cell (TSC) based on a semitransparent inorganic CsPbBr3 perovskite solar cell (pero‐SC) as the top cell and an OSC as bottom cell is constructed. The high‐quality CsPbBr3 photoactive layer of the planar pero‐SC is prepared with a dual‐source vacuum coevaporation method, using stoichiometric precursors of CsBr and PbBr2 with a low evaporation rate. The resultant opaque planar pero‐SC exhibits an ultrahigh open‐circuit voltage of 1.44 V and the highest reported PCE of 7.78% for a CsPbBr3‐based planar pero‐SC. Importantly, the devices show no degradation after 120 h UV light illumination. The related semitransparent pero‐SC can almost completely filter UV light and well maintain photovoltaic performance; it additionally shows an extremely high average visible transmittance. When it is used to construct a TSC, the top pero‐SC acting as a UV filter can utilize UV light for photoelectric conversion, avoiding the instability problem of UV light on the bottom OSC that can meet the industrial standards of UV‐light stability for solar cells, and leading to the highest reported PCE of 14.03% for the inorganic‐perovskite/organic TSC. 相似文献
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Silicon Solar Cells: 15.7% Efficient 10‐μm‐Thick Crystalline Silicon Solar Cells Using Periodic Nanostructures (Adv. Mater. 13/2015) 下载免费PDF全文
Matthew S. Branham Wei‐Chun Hsu Selcuk Yerci James Loomis Svetlana V. Boriskina Brittany R. Hoard Sang Eon Han Gang Chen 《Advanced materials (Deerfield Beach, Fla.)》2015,27(13):2268-2268
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