title: Considerably improved photovoltaic performance of carbon nanotube-based solar cells using metal oxide layers.
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.
authors.affiliation: Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan.
authors.forename: Feijiu
authors.initials: F
authors.lastname: Wang
authors.affiliation: Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan.
authors.forename: Daichi
authors.initials: D
authors.lastname: Kozawa
authors.affiliation: 1] Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan [2] Japan Science and Technology Agency, PRESTO, Kawaguchi 332-0012, Japan.
authors.forename: Yuhei
authors.initials: Y
authors.lastname: Miyauchi
authors.affiliation: Hitachi Zosen Corporation, Taisho 551-0022, Japan.
authors.forename: Kazushi
authors.initials: K
authors.lastname: Hiraoka
authors.affiliation: Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan.
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Mouri
authors.affiliation: Department of Quantum Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ohno
authors.affiliation: Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Matsuda