Characteristics of vapor-liquid-solid grown silicon nanowire solar cells

被引：173

作者：

Gunawan, Oki ^{[1
]}

Guha, Supratik ^{[1
]}

机构：

[1] IBM Corp, TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2009年 / 93卷 / 08期

关键词：

Nanowire; Vapor-liquid-solid; Gold impurities; Radial p-n junction; Surface passivation; ARRAYS; GOLD;

D O I：

10.1016/j.solmat.2009.02.024

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We report fabrication and characterization of solar cells based on vapor-liquid-solid (VLS) grown silicon nanowires (NWs) that form core-shell radial p-n junction structures. We observe efficiency enhancement due to the presence of the NWs that increase the light trapping within the device, while the use of gold as VLS catalyst results in increased carrier recombination within the wires. From the spectral efficiency data, we identify that the surface recombination effect becomes more significant in the large surface area NW cells. To remedy this issue we demonstrate the efficacy of a highly conformal Al2O3 film grown by atomic layer deposition to serve as surface passivation layer. This work highlights the key issues confronted by NW-based solar cells grown by VLS technique. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1388 / 1393

页数：6

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