文章基本信息

标题：Electronic Structure Engineering of Cu2O Film/ZnO Nanorods Array All-Oxide p-n Heterostructure for Enhanced Photoelectrochemical Property and Self-powered Biosensing Application
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作者：Zhuo Kang ; Xiaoqin Yan ; Yunfei Wang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep07882
语种：English
出版社：Springer Nature
摘要：We have engineered the electronic structure at the interface between Cu₂O and ZnO nanorods (NRs) array, through adjusting the carrier concentration of Cu₂O. The electrodeposition of Cu₂O at pH 11 acquired the highest carrier concentration, resulting in the largest interfacial electric field between Cu₂O and ZnO, which finally led to the highest separation efficiency of photogenerated charge carriers. The optimized Cu₂O/ZnO NRs array p-n heterostructures exhibited enhanced PEC performance, such as elevated photocurrent and photoconversion efficiency, as well as excellent sensing performance for the sensitive detection of glutathione (GSH) in PBS buffer even at applied bias of 0 V which made the device self-powered. Besides, the favorable selectivity, high reproducibility and extremely wide detection range, make such heterostructure a promising candidate for PEC biosensing applications, probably for the extended field of PEC water splitting or other solar photovoltaic beacons.