Efficient Light Harvesting by Photon Downconversion and Light Trapping in Hybrid ZnS Nanoparticles/Si Nanotips Solar Cells

被引：81

作者：

Huang, Chun-Ying ^{[2
]}

Wang, Di-Yan ^{[3
]}

Wang, Chun-Hsiung ^{[1
]}

Chen, Yung-Ting ^{[1
]}

Wang, Yaw-Tyng ^{[3
]}

Jiang, You-Ting ^{[3
]}

Yang, Ying-Jay ^{[2
]}

Chen, Chia-Chun ^{[3
,4
]}

Chen, Yang-Fang

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[2] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 106, Taiwan

[3] Natl Taiwan Normal Univ, Dept Chem, Taipei 116, Taiwan

[4] Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan

来源：

ACS NANO | 2010年 / 4卷 / 10期

关键词：

solar cell; downconversion; light trapping; quantum dot; silicon nanotips; light harvesting; SILICON; NANOCRYSTALS; NITRIDE; FILMS;

D O I：

10.1021/nn101817s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A hybrid colloidal ZnS nanoparticles/Si nanotips p-n active layer has been demonstrated to have promising potential for efficient solar spectrum utilization in crystalline silicon-based solar cells. The hybrid solar cell shows an enhancement of 20% in the short-circuit current and approximately 10% in power conversion efficiency compared to its counterpart without integrating ZnS nanoparticles. The enhancement has been investigated by external quantum efficiency, photoluminescence excitation spectrum, photoluminescence, and reflectance to distinct the role of ZnS quantum dots for light harvesting. It is concluded that ZnS nanoparticles not only act as frequency downconversion centers in the ultraviolet region but also serve as antireflection coating for light trapping in the measured spectral regime. Our approach is ready to be extended to many other material systems for the creation of highly efficient photovoltaic devices.

引用

页码：5849 / 5854

页数：6

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