Chae, Sang Youn Lee, Myeongjae Kim, Min Je Cho, Jeong Ho Kim, BongSoo Joo, Oh-Shim 2024-01-19T16:00:52Z 2024-01-19T16:00:52Z 2021-09-02 2020-12-17 1864-5631 https://pubs.kist.re.kr/handle/201004/117674 An inorganic p-type CuInS2 semiconductor was combined with the semiconducting polymer of PNDI3OT-Se1 and PNDI3OT-Se2 with different HOMO/LUMO levels for photoelectrochemical hydrogen production. Charge transfer behaviors at polymer/CuInS2 junctions were investigated by electrochemical impedance spectroscopy. The heterojunction of p-CuInS2 and n-type polymer (both PNDI3OT-Se1 and Se2) successfully made p-n junctions and showed improved charge transfer. However, we found that higher HOMO levels of polymer than valence band maximum (VBM) of CuInS2 spurred charge recombination at interfaces. As a result, CuInS2/PNDI3OT-Se1/TiO2/Pt, which has suitable energy levels matched between PNDI3OT-Se1 and CuInS2, shows photocurrent (-15.67 mA cm(-2)) improved concretely when compared to a CuInS2/TiO2/Pt photoelectrode (-7.11 mA cm(-2)) at 0.0 V vs. RHE applied potential. Additionally, the photoelectrochemical stability of CuInS2/PNDI3OT-Se1/TiO2/Pt photoelectrode was also investigated. English WILEY-V C H VERLAG GMBH HIGH-PERFORMANCE BAND-OFFSET WATER EFFICIENT PHOTOCATHODES DRIVEN DEVICE LAYERS CELLS BIVO4 p-CuInS2/n-Polymer Semiconductor Heterojunction for Photoelectrochemical Hydrogen Evolution Article 10.1002/cssc.202002123 1 CHEMSUSCHEM, v.13, no.24, pp.6651 - 6659 CHEMSUSCHEM 13 24 6651 6659 scie scopus 000584648100001 2-s2.0-85094218670 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Chemistry Science & Technology - Other Topics Article HIGH-PERFORMANCE BAND-OFFSET WATER EFFICIENT PHOTOCATHODES DRIVEN DEVICE LAYERS CELLS BIVO4 CuInS2 hydrogen p-n junction polymer semiconductor photoelectrochemical cell