Hybrid Heterojunction Solar Cell Based on Organic-Inorganic Silicon Nanowire Array Architecture

被引:254
作者
Shen, Xiaojuan [1 ]
Sun, Baoquan [1 ]
Liu, Dong [1 ]
Lee, Shuit-Tong [2 ]
机构
[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China
[2] City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
ENERGY-CONVERSION; PHOTOVOLTAIC APPLICATIONS; RECOMBINATION; EFFICIENCY; PASSIVATION; PERFORMANCE; SURFACES; GLASS;
D O I
10.1021/ja205703c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Silicon nanowire arrays (SiNWs) on a planar silicon wafer can be fabricated by a simple metal-assisted wet chemical etching method. They can offer an excellent light harvesting capability through light scattering and trapping. In this work, we demonstrated that the organic inorganic solar cell based on hybrid composites of conjugated molecules and SiNWs on a planar substrate yielded an excellent power conversion efficiency (PCE) of 9.70%. The high efficiency was ascribed to two aspects: one was the improvement of the light absorption by SiNWs structure on the planar components; the other was the enhancement of charge extraction efficiency, resulting from the novel top contact by forming a thin organic layer shell around the individual silicon nanowire. On the contrary, the sole planar junction solar cell only exhibited a PCE of 6.01%, due to the lower light trapping capability and the less hole extraction efficiency. It indicated that both the SiNWs structure and the thin organic layer top contact were critical to achieve a high performance organic/silicon solar cell.
引用
收藏
页码:19408 / 19415
页数:8
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