Optical absorption in c-Si/a-Si:H core/shell nanowire arrays for photovoltaic applications

被引：18

作者：

Xie, W. Q. ^{[1
,2
,3
]}

Liu, W. F. ^{[1
,2
,3
]}

Oh, J. I. ^{[1
,2
,3
,4
]}

Shen, W. Z. ^{[1
,2
,3
]}

机构：

[1] Shanghai Jiao Tong Univ, Lab Condensed Matter Spect & Optoelect Phys, Dept Phys, Minist Educ, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Key Lab Artificial Struct & Quantum Control, Dept Phys, Minist Educ, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Inst Solar Energy, Shanghai 200240, Peoples R China

[4] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 03期

关键词：

COUPLED-WAVE ANALYSIS; IMPLEMENTATION; ENHANCEMENT;

D O I：

10.1063/1.3615297

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical properties have been numerically investigated in crystalline Si (c-Si)/hydrogenated amorphous Si (a-Si:H) core/shell nanowire (CSNW) arrays for various structural parameters. We have demonstrated that the light absorption can be greatly enhanced in c-Si/a-Si:H CSNW arrays especially for the weak absorption solar band (1.5-2.5 eV) of crystalline silicon nanowire (c-SiNW) arrays. We have also obtained the optimal parameters for photovoltaic applications, at which the photocurrent enhancement factors have been achieved to be 14% and 345% per volume material compared to in c-SiNW arrays and c-Si films, respectively. Furthermore, the underlying mechanism of the absorption enhancement in CSNW arrays has been discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615297]

引用

页数：3