Efficient Solar-to-Hydrogen Conversion from Neutral Electrolytes using Morphology- Controlled Sb2Se3 Light Absorbers

被引：69

作者：

Park, Jaemin ^{[1
]}

Yang, Wooseok ^{[1
]}

Oh, Yunjung ^{[1
]}

Tan, Jeiwan ^{[1
]}

Lee, Hyungsoo ^{[1
]}

Boppella, Ramireddy ^{[1
]}

Moon, Jooho ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

来源：

ACS ENERGY LETTERS | 2019年 / 4卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

THIN-FILM; NANOROD ARRAYS; TANDEM CELL; WATER; PHOTOCATHODES; EVOLUTION; PHOTOVOLTAICS; FABRICATION;

D O I：

10.1021/acsenergylett.8b02323

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present a novel solution-based synthesis method enabling the morphology variation of Sb2Se3 light absorbers. The morphology of Sb2Se3 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 Sb2Se3-based photocathodes is investigated. Sequential deposition of CdS as a buffer layer with TiO2 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 Sb2Se3 photocathodcs as efficient PEC water-splitting devices.

引用

页码：517 / 526

页数：19

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