Open Access Nano Express

Enhanced solar energy conversion in Au-doped, single-wall carbon nanotube-Si heterojunction cells

Leifeng Chen12*, Hong He23, Shijun Zhang1, Chen Xu1, Jianjiang Zhao1, Shichao Zhao2, Yuhong Mi2 and Deren Yang1

Author affiliations

1 State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China

2 College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China

3 Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, People's Republic of China

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Citation and License

Nanoscale Research Letters 2013, 8:225  doi:10.1186/1556-276X-8-225

Published: 10 May 2013

Abstract

The power conversion efficiency (PCE) of single-wall carbon nanotube (SCNT)/n-type crystalline silicon heterojunction photovoltaic devices is significantly improved by Au doping. It is found that the overall PCE was significantly increased to threefold. The efficiency enhancement of photovoltaic devices is mainly the improved electrical conductivity of SCNT by increasing the carrier concentration and the enhancing the absorbance of active layers by Au nanoparticles. The Au doping can lead to an increase of the open circuit voltage through adjusting the Fermi level of SCNT and then enhancing the built-in potential in the SCNT/n-Si junction. This fabrication is easy, cost-effective, and easily scaled up, which demonstrates that such Au-doped SCNT/Si cells possess promising potential in energy harvesting application.

Keywords:
Solar cell; Single-wall carbon nanotube; Chemical doping; Conductivity; Au nanoparticles; Plasmon resonance