CuInS2Photocathodes with Atomic Gradation-Controlled (Ta,Mo) x(O,S) yPassivation Layers for Efficient Photoelectrochemical H2Production

Sang Youn Chae; Yoolim Kim; Eun Duck Park; Sang Hyuk Im; Oh Shim Joo

doi:10.1021/acsami.1c09560

CuInS₂Photocathodes with Atomic Gradation-Controlled (Ta,Mo) _x(O,S) _yPassivation Layers for Efficient Photoelectrochemical H₂Production

Sang Youn Chae, Yoolim Kim, Eun Duck Park, Sang Hyuk Im, Oh Shim Joo

Department of Chemical and Biological Engineering

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

10 Citations (Scopus)

Abstract

An atomic gradient passivation layer, (Ta,Mo)x(O,S)y, is designed to improve the charge transportation and photoelectrochemical activity of CuInS2-based photoelectrodes. We found that Mo spontaneously diffused to the a-TaOx layer during e-beam evaporation. This result indicates that the gradient profile of MoOx/TaOx is formed in the sublayer of (Ta,Mo)x(O,S)y. To understand the atomic-gradation effects of the (Ta,Mo)x(O,S)y passive layer, the composition and (photo)electrochemical properties have been characterized in detail. When this atomic gradient-passive layer is applied to CuInS2-based photocathodes, promising photocurrent and onset potential are seen without using Pt cocatalysts. This is one of the highest activities among reported CuInS2 photocathodes, which are not combined with noble metal cocatalysts. Excellent photoelectrochemical activity of the photoelectrode can be mainly achieved by (1) the electron transient time improved due to the conductive Mo-incorporated TaOx layer and (2) the boosted electrocatalytic activity by Mox(O,S)y formation.

Original language	English
Pages (from-to)	58447-58457
Number of pages	11
Journal	ACS Applied Materials and Interfaces
Volume	13
Issue number	49
DOIs	https://doi.org/10.1021/acsami.1c09560
Publication status	Published - 2021 Dec 15

Bibliographical note

Funding Information:
This study was supported by the institutional program of the Korea Institute of Science and Technology (no. KIST-2E31241) and the C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (no. 2015M3D3A1A01064899). This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2020R1I1A1A01073326).

Publisher Copyright:
©

Keywords

CuInS
atomic gradation
passivation layer
photoelectrochemical cell
tantalum oxide

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.1021/acsami.1c09560

Cite this

@article{c0044abb413849c792dd009464cbd5c7,

title = "CuInS2Photocathodes with Atomic Gradation-Controlled (Ta,Mo) x(O,S) yPassivation Layers for Efficient Photoelectrochemical H2Production",

abstract = "An atomic gradient passivation layer, (Ta,Mo)x(O,S)y, is designed to improve the charge transportation and photoelectrochemical activity of CuInS2-based photoelectrodes. We found that Mo spontaneously diffused to the a-TaOx layer during e-beam evaporation. This result indicates that the gradient profile of MoOx/TaOx is formed in the sublayer of (Ta,Mo)x(O,S)y. To understand the atomic-gradation effects of the (Ta,Mo)x(O,S)y passive layer, the composition and (photo)electrochemical properties have been characterized in detail. When this atomic gradient-passive layer is applied to CuInS2-based photocathodes, promising photocurrent and onset potential are seen without using Pt cocatalysts. This is one of the highest activities among reported CuInS2 photocathodes, which are not combined with noble metal cocatalysts. Excellent photoelectrochemical activity of the photoelectrode can be mainly achieved by (1) the electron transient time improved due to the conductive Mo-incorporated TaOx layer and (2) the boosted electrocatalytic activity by Mox(O,S)y formation. ",

keywords = "CuInS, atomic gradation, passivation layer, photoelectrochemical cell, tantalum oxide",

author = "Chae, {Sang Youn} and Yoolim Kim and Park, {Eun Duck} and Im, {Sang Hyuk} and Joo, {Oh Shim}",

note = "Funding Information: This study was supported by the institutional program of the Korea Institute of Science and Technology (no. KIST-2E31241) and the C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (no. 2015M3D3A1A01064899). This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2020R1I1A1A01073326). Publisher Copyright: {\textcopyright} ",

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T1 - CuInS2Photocathodes with Atomic Gradation-Controlled (Ta,Mo) x(O,S) yPassivation Layers for Efficient Photoelectrochemical H2Production

AU - Chae, Sang Youn

AU - Kim, Yoolim

AU - Park, Eun Duck

AU - Im, Sang Hyuk

AU - Joo, Oh Shim

N1 - Funding Information: This study was supported by the institutional program of the Korea Institute of Science and Technology (no. KIST-2E31241) and the C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (no. 2015M3D3A1A01064899). This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2020R1I1A1A01073326). Publisher Copyright: ©

PY - 2021/12/15

Y1 - 2021/12/15

N2 - An atomic gradient passivation layer, (Ta,Mo)x(O,S)y, is designed to improve the charge transportation and photoelectrochemical activity of CuInS2-based photoelectrodes. We found that Mo spontaneously diffused to the a-TaOx layer during e-beam evaporation. This result indicates that the gradient profile of MoOx/TaOx is formed in the sublayer of (Ta,Mo)x(O,S)y. To understand the atomic-gradation effects of the (Ta,Mo)x(O,S)y passive layer, the composition and (photo)electrochemical properties have been characterized in detail. When this atomic gradient-passive layer is applied to CuInS2-based photocathodes, promising photocurrent and onset potential are seen without using Pt cocatalysts. This is one of the highest activities among reported CuInS2 photocathodes, which are not combined with noble metal cocatalysts. Excellent photoelectrochemical activity of the photoelectrode can be mainly achieved by (1) the electron transient time improved due to the conductive Mo-incorporated TaOx layer and (2) the boosted electrocatalytic activity by Mox(O,S)y formation.

AB - An atomic gradient passivation layer, (Ta,Mo)x(O,S)y, is designed to improve the charge transportation and photoelectrochemical activity of CuInS2-based photoelectrodes. We found that Mo spontaneously diffused to the a-TaOx layer during e-beam evaporation. This result indicates that the gradient profile of MoOx/TaOx is formed in the sublayer of (Ta,Mo)x(O,S)y. To understand the atomic-gradation effects of the (Ta,Mo)x(O,S)y passive layer, the composition and (photo)electrochemical properties have been characterized in detail. When this atomic gradient-passive layer is applied to CuInS2-based photocathodes, promising photocurrent and onset potential are seen without using Pt cocatalysts. This is one of the highest activities among reported CuInS2 photocathodes, which are not combined with noble metal cocatalysts. Excellent photoelectrochemical activity of the photoelectrode can be mainly achieved by (1) the electron transient time improved due to the conductive Mo-incorporated TaOx layer and (2) the boosted electrocatalytic activity by Mox(O,S)y formation.

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