Electronic structure engineering of Cu2O film/ZnO nanorods array all-oxide p-n heterostructure for enhanced photoelectrochemical property and self-powered biosensing application.

Abstract:

: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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Kang Z,Yan X,Wang Y,Bai Z,Liu Y,Zhang Z,Lin P,Zhang X,Yuan H,Zhang X,Zhang Y

doi

10.1038/srep07882

subject

Has Abstract

pub_date

2015-01-20 00:00:00

pages

7882

issn

2045-2322

pii

srep07882

journal_volume

5

pub_type

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