The trade-off of light trapping between top and bottom cell in micromorph tandem solar cells with sputtering ZnO:Al glass substrate

被引：12

作者：

Bai, Lisha ^{[1
]}

Liu, Bofei ^{[1
]}

Fan, Jun ^{[1
]}

Zhang, Dekun ^{[1
]}

Wei, Changchun ^{[1
]}

Sun, Jian ^{[1
]}

Zhao, Ying ^{[1
]}

Zhang, Xiaodan ^{[1
]}

机构：

[1] Nankai Univ, Inst Photo Elect Thin Film Devices & Technol, Key Lab Photoelect Thin Film Devices & Technol, Tianjin 300071, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2014年 / 266卷

基金：

中国国家自然科学基金;

关键词：

a-Si:H/mu c-Si:H Tandem solar cell; Light trapping; ZnO:Al substrate; Long wavelength light; Intermediate reflector; HIGH-DEPOSITION-RATE; MICROCRYSTALLINE SILICON; INTERMEDIATE REFLECTOR; OXIDE; PROGRESS;

D O I：

10.1016/j.jpowsour.2014.04.150

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A simulated and experimental investigation of the trade-off between light trapping and current matching in p-i-n structured a-Si:H/mu c-Si:H tandem solar cells is presented, which aims to address the limited short circuit current density (J(sc)) that results from the low long-wavelength light scattering of the fluorine-doped tin oxide (SnO2:F) substrates typically used. To this end, the mismatch of the J(sc) between the top and bottom cells is reduced by utilizing a ZnO:Al substrate with optimized long-wavelength light scattering properties as the front contact, thereby improving the response of the bottom cell at the expense of the lower top cell's j(sc) yet. A trade-off between the top and bottom cell's light response is subsequently found with SnO2 or ZnO:Al as a substrate, by introducing an n-type mu C-SiOx intermediate reflector (IR) between the two component cells. An initial efficiency based on an approximate current matching of 11.90% is achieved for a-Si:H/mu c-Si:H tandem solar cell by adopting a magnetron-sputtered and texture-etched ZnO:Al substrate and an optimized n-type mu C-SiOx IR. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：138 / 144

页数：7

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