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Enhanced photocurrent generation from indium–tin-oxide/Fe2TiO5 hybrid nanocone arrays

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Title: Enhanced photocurrent generation from indium–tin-oxide/Fe2TiO5 hybrid nanocone arrays
Authors: Chen, Kai Browse this author →KAKEN DB
Dao, Thang Duy Browse this author
Ngo, Thien Duc Browse this author
Ngo, Hai Dang Browse this author
Tamanai, Akemi Browse this author
Ishii, Satoshi Browse this author
Li, Xiangping Browse this author
Misawa, Hiroaki Browse this author →KAKEN DB
Nagao, Tadaaki Browse this author →KAKEN DB
Keywords: Mie resonance
Iron titanate (Fe2TiO5)
Issue Date: Oct-2020
Publisher: Elsevier
Journal Title: Nano Energy
Volume: 76
Start Page: 104965
Publisher DOI: 10.1016/j.nanoen.2020.104965
Abstract: Semiconductor oxide materials, including α-Fe2O3 (hematite), have been investigated as possible candidates for large-scale solar-to-chemical energy conversion. However, many of these materials suffer from inefficient charge transport leading to undesirable charge recombination. Although plasmon-enhanced photocatalysis has achieved some success in enhancing light absorption and hot carrier generation, the intrinsic ohmic losses within the metal hinder its wide applications. Here, we use large-area indium-tin-oxide (ITO) nanocone arrays that exhibit both high electrical transport, strong light trapping and enlarged surface area with reduced ohmic losses. We further adopted sputtered iron titanate (Fe2TiO5) thin films that show better photocatalytic performance than hematite. The photoanode made of all-oxide ITO/Fe2TiO5 nanocone array exhibited Mie resonance-enhanced photocurrent generation up to 31 times. These ITO nanocones can be readily combined with other oxide materials providing great opportunities for efficient photon management in enhanced photocatalysis.
Rights: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長尾 忠昭

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