Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 52, Issue 22, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab0728
Keywords
photodetector; ZnO; pyro-phototronic effect; piezo-phototronic effect
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Funding
- National Natural Science Foundation of China [11574033]
- Beijing cooperative construction project, Beijing Higher Education Young Elite Teacher Project
- Fundamental Research Funds for the Central Universities
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As a direct bandgap semiconductor, zinc oxide (ZnO) has attracted substantial attention in the UV detecting field because of its wide bandgap and high exciton-binding energy. Benefiting from its pyroelectrical property, the response range of ZnO-based photodetectors can expand to the visible range and even infrared light by using the light-heating effect. In this review, ZnO-based photodetectors are summarized, from pure pyroelectric detectors and traditional photon detectors based on internal photoelectric effects to the hybridized photodetectors with pyroelectric and photoelectric effects. Also, the pyro-phototronic effect is presented as an efficient way to solve the slow response problem of most ZnO-based photodetectors by naturally coupling the light-self-induced pyroelectric effect and internal photoelectric effect. Lastly, we review the recent achievements of these ZnO-based photodetectors, discuss the challenges and look forward to the future of pyro-phototronic effect enhanced photodetectors.
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