Journal
NANOSCALE RESEARCH LETTERS
Volume 11, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1186/s11671-016-1499-1
Keywords
Photodetector; Flexible nanodevice; Heterojunction; Piezo-phototronic effect; Double-shell nanostructure
Funding
- NSFC [51472056]
- thousand talents program for pioneer researcher and his innovation team, China
- Recruitment Program of Global Youth Experts, China
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In this work, we present a facile, low-cost, and effective approach to fabricate the UV photodetector with a CuI/ZnO double-shell nanostructure which was grown on common copper microwire. The enhanced performances of Cu/CuI/ZnO core/double-shell microwire photodetector resulted from the formation of heterojunction. Benefiting from the piezo-phototronic effect, the presentation of piezocharges can lower the barrier height and facilitate the charge transport across heterojunction. The photosensing abilities of the Cu/CuI/ZnO core/double-shell microwire detector are investigated under different UV light densities and strain conditions. We demonstrate the I-V characteristic of the as-prepared core/double-shell device; it is quite sensitive to applied strain, which indicates that the piezo-phototronic effect plays an essential role in facilitating charge carrier transport across the CuI/ZnO heterojunction, then the performance of the device is further boosted under external strain.
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