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Open Access Nano Express

Strong, conductive carbon nanotube fibers as efficient hole collectors

Yi Jia1, Xiao Li1, Peixu Li1, Kunlin Wang1, Anyuan Cao2, Jinquan Wei1, Hongwei Zhu13* and Dehai Wu1*

Author Affiliations

1 Key Laboratory for Advanced Materials Processing Technology, Ministry of Education and Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, People's Republic of China

2 Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, 100871, People's Republic of China

3 Center for Nano and Micro Mechanics, Tsinghua University, Beijing, 100084, People's Republic of China

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Nanoscale Research Letters 2012, 7:137  doi:10.1186/1556-276X-7-137

Published: 17 February 2012

Abstract

We present the photovoltaic properties of heterojunctions made from single-walled carbon nanotube (SWNT) fibers and n-type silicon wafers. The use of the opaque SWNT fiber allows photo-generated holes to transport along the axis direction of the fiber. The heterojunction solar cells show conversion efficiencies of up to 3.1% (actual) and 10.6% (nominal) at AM1.5 condition. In addition, the use of strong, environmentally benign carbon nanotube fibers provides excellent structural stability of the photovoltaic devices.

Keywords:
carbon nanotubes; fibers; heterojunction; solar cells