articleAdvanced MaterialsJan 2, 2026Closed access

(Zn,Ti)O Electron Transport Layer Enables the Highest Conversion Efficiency in Cd‐Free Sb 2 Se 3 Photocathodes for Stable Solar Hydrogen Production

SCShuo ChenYCYong ChenHZHanhua ZhangMAMuhammad AbbasDRDonglou REN

Shenzhen University · Guangxi University

PubMed
Indexed incrossrefpubmed

Abstract

ABSTRACT Antimony selenide (Sb 2 Se 3 ) has emerged as a promising photocathode material for photoelectrochemical (PEC)‐driven solar hydrogen production due to its low toxicity, cost‐effectiveness, and excellent photoelectric properties. Currently, efficient Sb 2 Se 3 photocathodes are mostly coupled with CdS electron transport layer (ETL), however, suffering from natural toxicity, parasitic light absorption, and interfacial mismatch and/or instability. In this study, we introduce a Cd‐free Sb 2 Se 3 photocathode with an atomic layer deposition‐processed (Zn,Ti)O ETL, which mitigates the respective limitations of binary oxides (i.e., ZnO and TiO 2 ). The optimized (Zn,Ti)O ETL enhances electron carrier…

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Topics & keywords

Topics
Keywords
  • Photocathode
  • Photocurrent
  • Layer (electronics)
  • Energy conversion efficiency
  • Hydrogen production
  • Tandem
  • Solar fuel
  • Photoelectric effect
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