Nearly 100% Charge Transfer in BiVO₄ via Conjugated Organic-Inorganic Interface Engineering for Photoelectrochemical Water Splitting.

Authors

Qingjie Wang, Mengjie Gong, Haiwen Shi, Zhongliao Wang, Xin Ding, Yang Liu, Bing Li, Jingshan Luo

Published in

ChemSusChem. Volume 19. Issue 19. Pages e71103. Oct 14, 2026.

Abstract

Photoelectrochemical water splitting is regarded as a promising strategy for the direct conversion of solar energy into hydrogen energy. However, detrimental bulk charge transport and surface trap-state-mediated carrier recombination result in low efficiency. Herein, we propose a dual hole transport layer strategy by combining a covalent organic polymer (CHN) framework and an inorganic NiO_x layer to enhance the PEC performance of BiVO₄ photoanode. The dual hole transport layers not only reinforce the built-in electric field but also reduce the surface-state-mediated charge recombination. The resulting BiVO₄/CHN/NiO_x/NiFeO_x photoanode delivers a high photocurrent density of 4.45 mA/cm² at 1.23 V versus RHE and excellent stability for continuous 24 h illumination. Overall, this work provides a versatile platform for interface engineering modulation of BiVO₄ photoanodes, and sheds light on the mechanism of organic-inorganic hole transport layers for boosting PEC performance.

PMID:
42802671
Bibliographic data and abstract were imported from PubMed on 28 Sep 2026.

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