Photoelectrochemical (PEC) cells involved with semiconductor electrodes can simultaneously absorb solar energy and perform chemical reactions, which are considered as an attractive strategy to produce renewable and clean hydrogen energy. Sb₂Se₃ has been widely investigated in constructing PEC photocathodes benefitting of its low toxicity, suitable band gap, superior optoelectronic properties, and outstanding photocorrosion stability. We first present a brief overview of basic concepts and principles of PEC water splitting as well as a comparison between Sb₂Se₃ and other numerous candidates. Then the material characteristics and preparation methods of Sb₂Se₃ are introduced. The development of Sb₂Se₃-based photocathodes in PEC water splitting with various architectures and engineering efforts (i.e., absorber engineering, interfaces engineering, co-catalyst engineering and tandem engineering) to improve solar-to-hydrogen (STH) efficiency are highlighted. Finally, we debate the possible future directions to further explore the researching fields of Sb₂Se₃-based photocathodes with a strongly positive outlook in PEC processed solar hydrogen production.

与半导体电极相关的光电化学（PEC）电池可以同时吸收太阳能并进行化学反应，这被认为是生产可再生清洁氢能的一种有吸引力的策略。Sb ₂ Se ₃因其低毒性、合适的带隙、优异的光电性能和出色的光腐蚀稳定性而在构建PEC光电阴极方面得到了广泛的研究。我们首先简要概述 PEC 水分解的基本概念和原理，以及 Sb ₂ Se ₃与其他众多候选物之间的比较。那么Sb ₂ Se ₃的材料特性及制备方法介绍。Sb ₂ Se ₃基光电阴极在 PEC 水分解中的开发具有各种结构和工程努力（即吸收器工程、界面工程、助催化剂工程和串联工程），以提高太阳能制氢 (STH) 的效率. 最后，我们讨论了未来可能的方向，以进一步探索基于Sb ₂ Se ₃的光电阴极的研究领域，在 PEC 处理太阳能制氢方面具有强烈的积极前景。