Elucidating Carrier Dynamics and Interface Engineering in Sb2S3: Towards Efficient Photoanode for Water Oxidation.

IF 7.5 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ChemSusChem Pub Date : 2025-05-11 DOI:10.1002/cssc.202402764

Sudhanshu Shukla, Irene Dei Tos, Angelica Simbula, Julian Guerrero, Thanh Dong, Sownder Subramaniam, Beatriz de la Fuente, Vishal K Jose, Tom Aernouts, Negar Naghavi, Bart Vermang, Yinghuan Kuang

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引用次数: 0

Abstract

Conjugation of low-cost and high-performance semiconductors is essential in solar-driven photoelectrochemical (PEC) energy conversion. Sb2S3 is a wide-bandgap (≈1.7 eV) semiconductor with the potential to deliver a maximum photocurrent density of 24.5 mA cm-2, making it highly attractive for PEC water splitting applications. However, bulk Sb2S3 exhibits intrinsic recombination issues and low electron-hole separation, posing a limit to photocurrent generation. This study clarifies the carrier dynamics by ultrafast spectroscopy measurements and proposes the design of a heterojunction between Sb2S3 and SnO2, with suitable band-edge energy offset. The SnO2/Sb2S3 heterojunction enhances the charge separation efficiency, resulting in improvement of the photocurrent. The SnO2/Sb2S3 photoanode, fabricated entirely by vapor deposition processes, demonstrated photoelectrochemical water oxidation with a photocurrent density up to ca. 3 mA cm-2 at 1.38 V vs RHE.

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Sb2S3的载流子动力学和界面工程研究：迈向水氧化的高效光阳极。

在太阳能驱动的光电化学（PEC）能量转换中，低成本和高性能半导体的共轭是必不可少的。Sb2S3是一种宽带隙（≈1.7 eV）半导体，具有提供24.5 mA cm-2的最大光电流密度的潜力，使其在PEC水分解应用中具有很高的吸引力。然而，块体Sb2S3存在固有的复合问题和低电子空穴分离，限制了光电流的产生。本研究通过超快光谱测量澄清了载流子动力学，并提出了Sb2S3与SnO2之间具有合适带边能量偏移的异质结设计。SnO2/Sb2S3异质结提高了电荷分离效率，从而改善了光电流。完全通过气相沉积工艺制备的SnO2/Sb2S3光阳极在1.38 V vs RHE下具有高达约3 mA cm-2的光电流密度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ChemSusChem 化学-化学综合

CiteScore

15.80

自引率

4.80%

发文量

555

审稿时长

1.8 months

期刊介绍： ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology