Hybrid Silicon Nanocone-Polymer Solar Cells

被引:386
作者
Jeong, Sangmoo [2 ]
Garnett, Erik C. [1 ]
Wang, Shuang [2 ]
Yu, Zongu [2 ]
Fan, Shanhui [2 ]
Brongersma, Mark L. [1 ]
McGehee, Michael D. [1 ]
Cui, Yi [1 ,3 ]
机构
[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
[2] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA
[3] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA
关键词
Nanotexture; solar cell; heterojunction; conductive polymer; light trapping; NANOWIRE; ABSORPTION; ARRAYS;
D O I
10.1021/nl300713x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Recently, hybrid Si/organic solar cells have been studied for low-cost Si photovoltaic devices because the Schottky junction between the Si and organic material can be formed by solution processes at a low temperature. In this study, we demonstrate a hybrid solar cell composed of Si nanocones and conductive polymer. The optimal nanocone structure with an aspect ratio (height/diameter of a nanocone) less than two allowed for conformal polymer surface coverage via spin-coating while also providing both excellent antireflection and light trapping properties. The uniform heterojunction over the nanocones with enhanced light absorption resulted in a power conversion efficiency above 11%. Based on our simulation study, the optimal nanocone structures for a 10 mu m thick Si solar cell can achieve a short-circuit current density, up to 39.1 mA/cm(2), which is very close to the theoretical limit. With very thin material and inexpensive processing, hybrid Si nanocone/polymer solar cells are promising as an economically viable alternative energy solution.
引用
收藏
页码:2971 / 2976
页数:6
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