Photonic crystal microcrystalline silicon solar cells
Yoshinori Tanaka,Kenji Ishizaki,Menaka De Zoysa,Takami Umeda,Yosuke Kawamoto,Shoya Fujita,Susumu Noda +6 more
TLDR
In this paper, a method to incorporate photonic crystal structures into thin-film microcrystalline silicon photovoltaic layers while suppressing undesired defects formed in the microcrystaline silicon was proposed.Abstract:
Enhancing the absorption of thin-film microcrystalline silicon solar cells over a broadband range in order to improve the energy conversion efficiency is a very important challenge in the development of low cost and stable solar energy harvesting. Here, we demonstrate that a broadband enhancement of the absorption can be achieved by creating a large number of resonant modes associated with two-dimensional photonic crystal band edges. We utilize higher-order optical modes perpendicular to the silicon layer, as well as the band-folding effect by employing photonic crystal superlattice structures. We establish a method to incorporate photonic crystal structures into thin-film (~500 nm) microcrystalline silicon photovoltaic layers while suppressing undesired defects formed in the microcrystalline silicon. The fabricated solar cells exhibit 1.3 times increase of a short circuit current density (from 15.0 mA/cm2 to 19.6 mA/cm2) by introducing the photonic crystal structure, and consequently the conversion efficiency increases from 5.6% to 6.8%. Moreover, we theoretically analyze the absorption characteristics in the fabricated cell structure, and reveal that the energy conversion efficiency can be increased beyond 9.5% in a structure less than 1/400 as thick as conventional crystalline silicon solar cells with an efficiency of 24%. © 2015 The Authors. Progress in Photovoltaics: Research and Applications published by John Wiley & Sons Ltd.read more
Citations
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Periodically patterned micro-cone textures as high-efficiency light harvesting structure for broadband absorption enhancement in thin film silicon solar cells
Peizhuan Chen,Peizhuan Chen,Peizhuan Chen,Niu Pingjuan,Niu Pingjuan,Liyuan Yu,Liyuan Yu,Jianjun Zhang,Qi Hua Fan,Pingfan Ning,Pingfan Ning,Guofu Hou +11 more
TL;DR: In this paper, a broadband absorption enhancement method for n-i-p thin-film silicon solar cells using Micro-Cone Patterned Substrates (MCPSs) is presented.
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Si-based Solar Cells’ Conversion Efficiency Related Publications Bibliometric Review During 2000-2017
TL;DR: In this paper, the authors analyzed the research trend and future research direction in the Si-based PV cells' conversion efficiency, and the 4647 publications data were retrieved from the Scopus database and analyzed.
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Self-Ordered Voids Formation in SiO2 Matrix by Ge Outdiffusion
Branko Pivac,Pavo Dubček,Jasna Dasović,Hrvoje Zorc,Sigrid Bernstorff,Janez Zavašnik,Branislav Vlahovic +6 more
TL;DR: The annealing behavior of very thin SiO2/Ge multilayers deposited on Si substrate by e-gun deposition in high vacuum was explored in this article, where it was shown that, after annesaling at moderate temperatures (800°C) in inert atmosphere, Ge is completely outdiffused from the SiO 2 matrix leaving small (about 3nm) spherical voids embedded in the siO2 matrix.
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Effects of frequency upconversion layer and two-dimensional arrays of inverted nanocone hole on the performance of ultrathin crystalline silicon solar cells
Chenbo Wang,Baoting Ding,Fei Bian,Ying Chun Yang,Tengteng Yu,Zhuoqun Li,Haiyan Wang,Zhaopeng Xu +7 more
TL;DR: In this article , the design and optimization of photonic crystal (PhC) structures within the crystalline silicon absorption layer in ultrathin solar cells with a frequency upconversion layer were investigated.
References
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Nanodome Solar Cells with Efficient Light Management and Self-Cleaning
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