p-CuInS2/n-Polymer Semiconductor Heterojunction for Photoelectrochemical Hydrogen Evolution

Sang Youn Chae; Myeongjae Lee; Min Je Kim; Jeong Ho Cho; Bong Soo Kim; Oh Shim Joo

doi:10.1002/cssc.202002123

p-CuInS₂/n-Polymer Semiconductor Heterojunction for Photoelectrochemical Hydrogen Evolution

Sang Youn Chae, Myeongjae Lee, Min Je Kim, Jeong Ho Cho, Bong Soo Kim, Oh Shim Joo

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	6651-6659
Number of pages	9
Journal	ChemSusChem
Volume	13
Issue number	24
DOIs	https://doi.org/10.1002/cssc.202002123
Publication status	Published - 2020 Dec 17

Bibliographical note

Funding Information:
This this study was supported by the program of the Korea Institute of Science and Technology. This work was also supported by the National Research Foundation of Korea (NRF‐2018R1A5A1025594) of the Ministry of Science and ICT. This work was supported by C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015M3D3A1A01064899). these authors have equally contribution ≠

Publisher Copyright:
© 2020 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

Environmental Chemistry
Chemical Engineering(all)
Materials Science(all)
Energy(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/cssc.202002123

Cite this

@article{d3ce27d6b24745e5b37b08c4501ac264,

title = "p-CuInS2/n-Polymer Semiconductor Heterojunction for Photoelectrochemical Hydrogen Evolution",

abstract = "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.",

author = "Chae, {Sang Youn} and Myeongjae Lee and {Je Kim}, Min and Cho, {Jeong Ho} and Kim, {Bong Soo} and Joo, {Oh Shim}",

note = "Funding Information: This this study was supported by the program of the Korea Institute of Science and Technology. This work was also supported by the National Research Foundation of Korea (NRF‐2018R1A5A1025594) of the Ministry of Science and ICT. This work was supported by C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015M3D3A1A01064899). these authors have equally contribution ≠ Publisher Copyright: {\textcopyright} 2020 Wiley-VCH GmbH",

year = "2020",

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doi = "10.1002/cssc.202002123",

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AU - Chae, Sang Youn

AU - Lee, Myeongjae

AU - Je Kim, Min

AU - Cho, Jeong Ho

AU - Kim, Bong Soo

AU - Joo, Oh Shim

N1 - Funding Information: This this study was supported by the program of the Korea Institute of Science and Technology. This work was also supported by the National Research Foundation of Korea (NRF‐2018R1A5A1025594) of the Ministry of Science and ICT. This work was supported by C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015M3D3A1A01064899). these authors have equally contribution ≠ Publisher Copyright: © 2020 Wiley-VCH GmbH

PY - 2020/12/17

Y1 - 2020/12/17

N2 - 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.

AB - 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.

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