Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep07882
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Funding
- National Major Research Program of China [2013CB932600]
- Major Project of International Cooperation and Exchanges [2012DFA50990]
- Program of Introducing Talents of Discipline to Universities
- National Natural Science Foundation of China [51232001, 51172022, 51372023, 31371203]
- Research Fund of Co-construction Program from Beijing Municipal Commission of Education
- Fundamental Research Funds for the Central Universities
- Program for Changjiang Scholars and Innovative Research Team in University
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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.
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