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- Title
Highly transparent oxide-based ultraviolet photodetectors for flexible electronics.
- Authors
Li, Yuanjie; Ma, Hailong; Hu, Wenbo; Zhao, Yuqing
- Abstract
Flexible ultraviolet (UV) photodetectors have attracted great interests for applications in portable and wearable optoelectronic systems. In this work, highly visible-transparent and flexible UV photodetectors based on nanocrystalline zinc oxide (ZnO) films were developed on polyimide substrates by utilizing radio frequency magnetron sputtering and shadow mask deposition. The crystallinity and surface morphology of the ZnO films have been optimized at the substrate temperature of 200 °C. The flexible photodetector exhibited an average transmittance over 85% in the visible spectral range and a large photo-to-dark current ratio of 1.2 × 104 under 360 nm UV illumination. Moreover, the detector demonstrated enhanced photoresponse performance with the rise and decay time of 3.24 s and 108.7 ms, respectively. The highest detectivity of the device reached 2.7 × 1011 cm Hz1/2/W at 5 V bias voltage under an UV illumination intensity of 0.38 mW/cm2. The realization of transparent oxide films-based UV photodetectors on flexible substrates provides potential to develop high-performance and large-scale wearable optoelectronic devices.
- Subjects
FLEXIBLE electronics; ZINC oxide films; OPTOELECTRONIC devices; PHOTODETECTORS; MAGNETRON sputtering; RADIO frequency; ZINC oxide; SURFACE morphology
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 19, p15546
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08460-x