Considerably improved photovoltaic performance of carbon nanotube-based solar cells using metal oxide layers

Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Yutaka Ohno and Kazunari Matsuda ()
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Feijiu Wang: Institute of Advanced Energy, Kyoto University
Daichi Kozawa: Institute of Advanced Energy, Kyoto University
Yuhei Miyauchi: Institute of Advanced Energy, Kyoto University
Kazushi Hiraoka: Hitachi Zosen Corporation
Shinichiro Mouri: Institute of Advanced Energy, Kyoto University
Yutaka Ohno: Nagoya University
Kazunari Matsuda: Institute of Advanced Energy, Kyoto University

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Carbon nanotube-based solar cells have been extensively studied from the perspective of potential application. Here we demonstrated a significant improvement of the carbon nanotube solar cells by the use of metal oxide layers for efficient carrier transport. The metal oxides also serve as an antireflection layer and an efficient carrier dopant, leading to a reduction in the loss of the incident solar light and an increase in the photocurrent, respectively. As a consequence, the photovoltaic performance of both p-single-walled carbon nanotube (SWNT)/n-Si and n-SWNT/p-Si heterojunction solar cells using MoOx and ZnO layers is improved, resulting in very high photovoltaic conversion efficiencies of 17.0 and 4.0%, respectively. These findings regarding the use of metal oxides as multifunctional layers suggest that metal oxide layers could improve the performance of various electronic devices based on carbon nanotubes.

Date: 2015
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DOI: 10.1038/ncomms7305

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