Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)2 Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell

Bonhyeong Koo; Daehan Kim; Passarut Boonmongkolras; Seong Ryul Pae; Segi Byun; Jekyung Kim; June Hyuk Lee; Dong Hoe Kim; Suncheul Kim; Byung Tae Ahn; Sung Wook Nam; Byungha Shin

doi:10.1021/acsaem.9b02387

Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)₂ Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell

Bonhyeong Koo, Daehan Kim, Passarut Boonmongkolras, Seong Ryul Pae, Segi Byun, Jekyung Kim, June Hyuk Lee, Dong Hoe Kim, Suncheul Kim, Byung Tae Ahn, Sung Wook Nam, Byungha Shin

Department of Medicine

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

40 Scopus citations

Abstract

By introducing ZnS between Cu(In, Ga)(S,Se)₂ (CIGS) and the CdS, we greatly improved the photoelectrochemical (PEC) performance of the CIGS photocathode for hydrogen evolution. Chemical and structural analysis reveals that the enhanced performance is due to additional band bending driven by in-diffusion of Zn into the CIGS and suppression of nonradiative recombination. The improved onset potential of CIGS photocathode was exploited by building a tandem device with a perovskite absorber for bias-free water splitting. A PEC device with a solar-to-hydrogen conversion efficiency exceeding 9% (the highest among PEC cells including a CIGS photocathode) with a stable operation of 6.5 h is demonstrated.

Original language	English
Pages (from-to)	2296-2303
Number of pages	8
Journal	ACS Applied Energy Materials
Volume	3
Issue number	3
DOIs	https://doi.org/10.1021/acsaem.9b02387
State	Published - 23 Mar 2020

Keywords

Cu(In, Ga)(S, Se) photocathode
perovskite solar cell
solar-to-hydrogen
surface band bending
unassisted solar water splitting

UN SDGs

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

Access to Document

10.1021/acsaem.9b02387

Cite this

Koo, B., Kim, D., Boonmongkolras, P., Pae, S. R., Byun, S., Kim, J., Lee, J. H., Kim, D. H., Kim, S., Ahn, B. T., Nam, S. W., & Shin, B. (2020). Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)₂ Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell. ACS Applied Energy Materials, 3(3), 2296-2303. https://doi.org/10.1021/acsaem.9b02387

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title = "Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)2 Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell",

abstract = "By introducing ZnS between Cu(In, Ga)(S,Se)2 (CIGS) and the CdS, we greatly improved the photoelectrochemical (PEC) performance of the CIGS photocathode for hydrogen evolution. Chemical and structural analysis reveals that the enhanced performance is due to additional band bending driven by in-diffusion of Zn into the CIGS and suppression of nonradiative recombination. The improved onset potential of CIGS photocathode was exploited by building a tandem device with a perovskite absorber for bias-free water splitting. A PEC device with a solar-to-hydrogen conversion efficiency exceeding 9% (the highest among PEC cells including a CIGS photocathode) with a stable operation of 6.5 h is demonstrated.",

keywords = "Cu(In, Ga)(S, Se) photocathode, perovskite solar cell, solar-to-hydrogen, surface band bending, unassisted solar water splitting",

author = "Bonhyeong Koo and Daehan Kim and Passarut Boonmongkolras and Pae, {Seong Ryul} and Segi Byun and Jekyung Kim and Lee, {June Hyuk} and Kim, {Dong Hoe} and Suncheul Kim and Ahn, {Byung Tae} and Nam, {Sung Wook} and Byungha Shin",

note = "Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",

year = "2020",

month = mar,

day = "23",

doi = "10.1021/acsaem.9b02387",

language = "English",

volume = "3",

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Koo, B, Kim, D, Boonmongkolras, P, Pae, SR, Byun, S, Kim, J, Lee, JH, Kim, DH, Kim, S, Ahn, BT, Nam, SW & Shin, B 2020, 'Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)₂ Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell', ACS Applied Energy Materials, vol. 3, no. 3, pp. 2296-2303. https://doi.org/10.1021/acsaem.9b02387

Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)₂ Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell. / Koo, Bonhyeong; Kim, Daehan; Boonmongkolras, Passarut et al.
In: ACS Applied Energy Materials, Vol. 3, No. 3, 23.03.2020, p. 2296-2303.

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

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T1 - Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)2 Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell

AU - Koo, Bonhyeong

AU - Kim, Daehan

AU - Boonmongkolras, Passarut

AU - Pae, Seong Ryul

AU - Byun, Segi

AU - Kim, Jekyung

AU - Lee, June Hyuk

AU - Kim, Dong Hoe

AU - Kim, Suncheul

AU - Ahn, Byung Tae

AU - Nam, Sung Wook

AU - Shin, Byungha

PY - 2020/3/23

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N2 - By introducing ZnS between Cu(In, Ga)(S,Se)2 (CIGS) and the CdS, we greatly improved the photoelectrochemical (PEC) performance of the CIGS photocathode for hydrogen evolution. Chemical and structural analysis reveals that the enhanced performance is due to additional band bending driven by in-diffusion of Zn into the CIGS and suppression of nonradiative recombination. The improved onset potential of CIGS photocathode was exploited by building a tandem device with a perovskite absorber for bias-free water splitting. A PEC device with a solar-to-hydrogen conversion efficiency exceeding 9% (the highest among PEC cells including a CIGS photocathode) with a stable operation of 6.5 h is demonstrated.

AB - By introducing ZnS between Cu(In, Ga)(S,Se)2 (CIGS) and the CdS, we greatly improved the photoelectrochemical (PEC) performance of the CIGS photocathode for hydrogen evolution. Chemical and structural analysis reveals that the enhanced performance is due to additional band bending driven by in-diffusion of Zn into the CIGS and suppression of nonradiative recombination. The improved onset potential of CIGS photocathode was exploited by building a tandem device with a perovskite absorber for bias-free water splitting. A PEC device with a solar-to-hydrogen conversion efficiency exceeding 9% (the highest among PEC cells including a CIGS photocathode) with a stable operation of 6.5 h is demonstrated.

KW - Cu(In, Ga)(S, Se) photocathode

KW - perovskite solar cell

KW - solar-to-hydrogen

KW - surface band bending

KW - unassisted solar water splitting

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