Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb                         2                         Se                         3                          Light Absorbers

Jaemin Park; Wooseok Yang; Yunjung Oh; Jeiwan Tan; Hyungsoo Lee; Ramireddy Boppella; Jooho Moon

doi:10.1021/acsenergylett.8b02323

Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb ₂ Se ₃ Light Absorbers

Jaemin Park, Wooseok Yang, Yunjung Oh, Jeiwan Tan, Hyungsoo Lee, Ramireddy Boppella, Jooho Moon

Department of Materials Science and Engineering

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

58 Citations (Scopus)

Abstract

We present a novel solution-based synthesis method enabling the morphology variation of Sb ₂ Se ₃ light absorbers. The morphology of Sb ₂ Se ₃ films varies from dense particulate planar films to one-dimensional nanowire-stacked films upon modulating the Sb and Se molar ratio in the precursor ink. The effect of morphology and crystallographic orientation on the electrical and consequently the PEC properties of Sb ₂ Se ₃ -based photocathodes is investigated. Sequential deposition of CdS as a buffer layer with TiO ₂ and Pt enables us to build a favorable band structure. An onset potential of 0.47 V versus a reversible hydrogen electrode (RHE) is observed with 13.5 mA cm ^-2 at 0 V versus a RHE under air mass 1.5 global illumination in a pH 1 electrolyte. In addition, the surface-modified photocathode stably produces hydrogen with a photocurrent of 11 mA cm ^-2 at 0 V versus RHE in a neutral electrolyte, thus demonstrating the promising potential of the proposed Sb ₂ Se ₃ photocathodes as efficient PEC water-splitting devices.

Original language	English
Pages (from-to)	517-526
Number of pages	10
Journal	ACS Energy Letters
Volume	4
Issue number	2
DOIs	https://doi.org/10.1021/acsenergylett.8b02323
Publication status	Published - 2019 Feb 8

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea grant (No. 2012R1A3A2026417) funded by the Ministry of Science and ICT.

Publisher Copyright:
© 2019 American Chemical Society.

All Science Journal Classification (ASJC) codes

Chemistry (miscellaneous)
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Materials Chemistry

UN SDGs

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

Access to Document

10.1021/acsenergylett.8b02323

Cite this

Park, J., Yang, W., Oh, Y., Tan, J., Lee, H., Boppella, R., & Moon, J. (2019). Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb ₂ Se ₃ Light Absorbers ACS Energy Letters, 4(2), 517-526. https://doi.org/10.1021/acsenergylett.8b02323

Park, Jaemin ; Yang, Wooseok ; Oh, Yunjung et al. / Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb ₂ Se ₃ Light Absorbers In: ACS Energy Letters. 2019 ; Vol. 4, No. 2. pp. 517-526.

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title = " Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb 2 Se 3 Light Absorbers ",

abstract = " We present a novel solution-based synthesis method enabling the morphology variation of Sb 2 Se 3 light absorbers. The morphology of Sb 2 Se 3 films varies from dense particulate planar films to one-dimensional nanowire-stacked films upon modulating the Sb and Se molar ratio in the precursor ink. The effect of morphology and crystallographic orientation on the electrical and consequently the PEC properties of Sb 2 Se 3 -based photocathodes is investigated. Sequential deposition of CdS as a buffer layer with TiO 2 and Pt enables us to build a favorable band structure. An onset potential of 0.47 V versus a reversible hydrogen electrode (RHE) is observed with 13.5 mA cm -2 at 0 V versus a RHE under air mass 1.5 global illumination in a pH 1 electrolyte. In addition, the surface-modified photocathode stably produces hydrogen with a photocurrent of 11 mA cm -2 at 0 V versus RHE in a neutral electrolyte, thus demonstrating the promising potential of the proposed Sb 2 Se 3 photocathodes as efficient PEC water-splitting devices.",

author = "Jaemin Park and Wooseok Yang and Yunjung Oh and Jeiwan Tan and Hyungsoo Lee and Ramireddy Boppella and Jooho Moon",

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Park, J, Yang, W, Oh, Y, Tan, J, Lee, H, Boppella, R & Moon, J 2019, ' Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb ₂ Se ₃ Light Absorbers ', ACS Energy Letters, vol. 4, no. 2, pp. 517-526. https://doi.org/10.1021/acsenergylett.8b02323

Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb ₂ Se ₃ Light Absorbers . / Park, Jaemin; Yang, Wooseok; Oh, Yunjung et al.
In: ACS Energy Letters, Vol. 4, No. 2, 08.02.2019, p. 517-526.

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

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N2 - We present a novel solution-based synthesis method enabling the morphology variation of Sb 2 Se 3 light absorbers. The morphology of Sb 2 Se 3 films varies from dense particulate planar films to one-dimensional nanowire-stacked films upon modulating the Sb and Se molar ratio in the precursor ink. The effect of morphology and crystallographic orientation on the electrical and consequently the PEC properties of Sb 2 Se 3 -based photocathodes is investigated. Sequential deposition of CdS as a buffer layer with TiO 2 and Pt enables us to build a favorable band structure. An onset potential of 0.47 V versus a reversible hydrogen electrode (RHE) is observed with 13.5 mA cm -2 at 0 V versus a RHE under air mass 1.5 global illumination in a pH 1 electrolyte. In addition, the surface-modified photocathode stably produces hydrogen with a photocurrent of 11 mA cm -2 at 0 V versus RHE in a neutral electrolyte, thus demonstrating the promising potential of the proposed Sb 2 Se 3 photocathodes as efficient PEC water-splitting devices.

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Park J, Yang W, Oh Y, Tan J, Lee H, Boppella R et al. Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology-Controlled Sb ₂ Se ₃ Light Absorbers ACS Energy Letters. 2019 Feb 8;4(2):517-526. doi: 10.1021/acsenergylett.8b02323