Optical Absorption Enhancement in Amorphous Silicon Nanowire and Nanocone Arrays

被引：1102

作者：

Zhu, Jia ^{[2
]}

Yu, Zongfu ^{[3
]}

Burkhard, George F. ^{[3
]}

Hsu, Ching-Mei ^{[1
]}

Connor, Stephen T. ^{[4
]}

Xu, Yueqin ^{[5
]}

Wang, Qi ^{[5
]}

McGehee, Michael ^{[1
]}

Fan, Shanhui ^{[2
]}

Cui, Yi ^{[1
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[4] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[5] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 01期

基金：

美国国家科学基金会;

关键词：

SOLAR-CELLS; PHOTOVOLTAIC APPLICATIONS; BROAD-BAND; NANOSTRUCTURES;

D O I：

10.1021/nl802886y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hydrogenated amorphous Si (a-Si:H) is an important solar cell material. Here we demonstrate the fabrication of a-Si:H nanowires (NWs) and nanocones (NCs), using an easily scalable and IC-compatible process. We also investigate the optical properties of these nanostructures. These a-Si:H nanostructures display greatly enhanced absorption over a large range of wavelengths and angles of incidence, due to suppressed reflection. The enhancement effect is particularly strong for a-Si:H NC arrays, which provide nearly perfect impedance matching between a-Si:H and air through a gradual reduction of the effective refractive index. More than 90% of light is absorbed at angles of incidence up to 60 for a-Si:H NC arrays, which is significantly better than NW arrays (70%) and thin films (45%). In addition, the absorption of NC arrays is 88% at the band gap edge of a-Si:H, which is much higher than NW arrays (70%) and thin films (53%). Our experimental data agree very well with simulation. The a-Si:H nanocones function as both absorber and antireflection layers, which offer a promising approach to enhance the solar cell energy conversion efficiency.

引用

页码：279 / 282

页数：4

共 21 条

[1] AMORPHOUS SILICON SOLAR-CELL [J].

CARLSON, DE ;

WRONSKI, CR .

APPLIED PHYSICS LETTERS, 1976, 28 (11) :671-673

[2]

Edwards D.F., 1985, Handbook of optical constants of solids

[3] Silicon nanowire radial p-n junction solar cells [J].

Garnett, Erik C. ;

Yang, Peidong .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (29) :9224-+

[4] Wafer-scale silicon nanopillars and nanocones by Langmuir-Blodgett assembly and etching [J].

Hsu, Ching-Mei ;

Connor, Stephen T. ;

Tang, Mary X. ;

Cui, Yi .

APPLIED PHYSICS LETTERS, 2008, 93 (13)

[5] Analysis of optical absorption in silicon nanowire Arrays for photovoltaic applications [J].

Hu, Lu ;

Chen, Gang .

NANO LETTERS, 2007, 7 (11) :3249-3252

[6] Improved broadband and quasi-omnidirectional anti-reflection properties with biomimetic silicon nanostructures [J].

Huang, Yi-Fan ;

Chattopadhyay, Surojit ;

Jen, Yi-Jun ;

Peng, Cheng-Yu ;

Liu, Tze-An ;

Hsu, Yu-Kuei ;

Pan, Ci-Ling ;

Lo, Hung-Chun ;

Hsu, Chih-Hsun ;

Chang, Yuan-Huei ;

Lee, Chih-Shan ;

Chen, Kuei-Hsien ;

Chen, Li-Chyong .

NATURE NANOTECHNOLOGY, 2007, 2 (12) :770-774

[7] Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells -: art. no. 114302 [J].

Kayes, BM ;

Atwater, HA ;

Lewis, NS .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (11)

[8] Photovoltaic measurements in single-nanowire silicon solar cells [J].

Kelzenberg, Michael D. ;

Turner-Evans, Daniel B. ;

Kayes, Brendan M. ;

Filler, Michael A. ;

Putnam, Morgan C. ;

Lewis, Nathan S. ;

Atwater, Harry A. .

NANO LETTERS, 2008, 8 (02) :710-714

[9] Nanowire dye-sensitized solar cells [J].

Law, M ;

Greene, LE ;

Johnson, JC ;

Saykally, R ;

Yang, PD .

NATURE MATERIALS, 2005, 4 (06) :455-459

[10] ZnO nanostructures as efficient antireflection layers in solar cells [J].

Lee, Yun-Ju ;

Ruby, Douglas S. ;

Peters, David W. ;

McKenzie, Bonnie B. ;

Hsu, Julia W. P. .

NANO LETTERS, 2008, 8 (05) :1501-1505

← 1 2 3 →