Investigation of the Electric Structures of Heterointerfaces in Pt- and In<sub>2</sub>S<sub>3</sub>-Modified CuInS<sub>2</sub> Photocathodes Used for Sunlight-Induced Hydrogen Evolution

DOI Web Site 被引用文献25件 参考文献37件
  • Gunawan
    Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
  • Wilman Septina
    Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
  • Takashi Harada
    Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
  • Yoshitaro Nose
    Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, 606-8501 Kyoto, Japan
  • Shigeru Ikeda
    Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan

書誌事項

公開日
2015-07-14
資源種別
journal article
DOI
  • 10.1021/acsami.5b04634
公開者
American Chemical Society (ACS)

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説明

Copper indium disulfide (CuInS2) modified with an In2S3 layer and a Pt catalyst showed a more efficient photoelectrochemical (PEC) property for hydrogen evolution from a nearly neutral (pH 6) 0.2 M NaH2PO4 solution under simulated sunlight illumination (AM 1.5G) than that of a CuInS2 electrode modified with a CdS layer and a Pt catalyst. Analysis of the PEC properties of In2S3-modified CuInS2 (In2S3/CuInS2) and CdS-modified CuInS2 (CdS/CuInS2) in solutions containing an electron scavenger (Eu3+) showed identical enhancement of the PEC properties of In2S3/CuInS2 when compared to those of CdS/CuInS2, indicating the formation of a favorable heterointerface in In2S3/CuInS2 for efficient charge separation. Spectroscopic evaluation of conduction band offsets revealed that In2S3/CuInS2 had a notch-type conduction band offset, whereas a cliff-type offset was formed in CdS/CuInS2: these results also revealed a better interface electric structure of In2S3/CuInS2 than that of CdS/CuInS2.

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