Simultaneous Modulation of Interface Reinforcement, Crystallization, Anti‐Reflection, and Carrier Transport in Sb Gradient‐Doped SnO₂/Sb₂S₃ Heterostructure for Efficient Photoelectrochemical Cell

Abstract

In this study, an effective quadruple optimization integrated synergistic strategy is designed to fabricate quality Sb gradient‐doped SnO2/Sb2S3 heterostructure for an efficient photoelectrochemical (PEC) cell. The experimental results and theoretical calculations reveal that i) optical absorption matching is realized by combining the anti‐reflection of SnO2 and high light absorption ability of Sb2S3 in the visible region; ii) interface reinforcement is carried out by coordinating gradient‐distributed Sb in SnO2 with S in S‐rich precursor of Sb2S3 for improving the Sb2S3 crystallization process and matching crystalline lattice of Sb:SnO2 and Sb2S3; iii) ultrahigh electron mobility is achieved by making Sb gradient‐doped SnO2; iv) carrier separation and transport are accelerated by constructing type‐II heterojunction with appropriate energy level alignment and forming a high‐speed electron transport channel. All of above‐mentioned optimization effects are integrated into a synergistic strategy for constructing the Sb:SnO2/Sb2S3 photoanode, achieving a photocurrent density of 2.30 mA cm−2, hydrogen generation rate of 30.03 µmol cm−2 h−1, and decent working stability. Notably, this method can also be used in other large‐scale fabrication processes, such as drop‐casting, spray‐coating, blade‐coating, printing, slot‐die, etc. Moreover, this universal integrated strategy paves an avenue to fabricate efficient photoelectrodes with excellent photoelectrochemical performances.

A Transparent, High‐Performance, and Stable Sb2S3 Photoanode Enabled by Heterojunction Engineering with Conjugated Polycarbazole Frameworks for Unbiased Photoelectrochemical Overall Water Splitting Devices

“…[18,21] Until now, the highest photocurrent density achieved in Sb 2 S 3based photoanodes is only ≈4.21 mA cm -2 and the reported applied bias photon-to-current efficiency (ABPE) is 1.56%. [22][23][24] There is much room to enhance the PEC performance of Sb 2 S 3 photoanodes.…”

Enhanced Aggregation-Induced Emission Activity of Metal–Organic Frameworks by Using Machine Learning Technology

“…Figure D,E presents the UV–visible and PL spectra of Eu-MOFs synthesized with the conditions of “ X -1-6” ( X stands for the synthesis temperature with the values of 100, 110, 120, 130, and 140, respectively), respectively. Previous works on the fluorescence quenching materials (such as graphene quantum dots, ,, CsPbX 3 nanocrystals, − PbS quantum dots, , etc.) have indicated that the light absorption spectrum has a wide range intersection with a light emission spectrum, and this phenomenon is also called self-absorption.…”

Fabricating Superhydrophobic Protective Films with Enhanced Self‐Cleaning and Anti‐Corrosion Properties through Multiple Anodic Oxidations on Aluminum Alloys

“…For example, complex micro‐nanostructures and waxes on lotus leaves allow water droplets on the surface to converge into beads and carry away contaminants as the water droplets roll [16] . It is well known that the superhydrophobicity is determined by the low surface energy material and suitable roughness of the surface, proper roughness can further enhance the hydrophobicity of the substrate surface [17–20] …”