光电阴极
异质结
范德瓦尔斯力
材料科学
光电流
欧姆接触
半导体
光电子学
基质(水族馆)
纳米技术
电子
物理
分子
海洋学
量子力学
地质学
图层(电子)
作者
Zemin Zhang,Xu Chen,Rui Hao,Qingliang Feng,Erqing Xie
标识
DOI:10.1002/adfm.202303391
摘要
Abstract Efficient photocarrier generation and collection are highly desirable for solar‐fuel conversion systems. However, the latter is challenging for many photoelectrodes due to carrier losses happening in the semiconductor‐electrolyte interface and the semiconductor‐substrate interface. To overcome it, a novel Au/CuBi 2 O 4 (CBO)/PtSe 2 van der Waals heterojunction photocathode has been developed to boost photocarrier collection. As a result, the ohmic contact at Au/CBO interface shows a low resistance for hole transfer. Meanwhile, while promoting electron transfer, the Van der Waals heterojunction of CBO/PtSe 2 interface with energy barrier‐blocked holes. Concurrently, the composite photocathode exhibits significantly enhanced performance: a photocurrent of −0.59 mA cm −2 at 0.5 V versus reversible hydrogen electrode and an H 2 O 2 generation rate of 2.39 mol (Lhm 2 ) −1 . This work demonstrates the charge regulation role of Van der Waals heterojunctions in the solar‐fuel system. More broadly, Van der Waals heterojunctions provide an excellent bond‐free approach to creating versatile optoelectronic devices.
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