Enhanced gain and detectivity of unipolar barrier solar blind avalanche photodetector via lattice and band engineering
Beijing University of Posts and Telecommunications · Nankai University · +2 more institutions
Abstract
Abstract Ga 2 O 3 -based solar blind avalanche photodetectors exhibit low voltage operation, optical filter-free and monolithic integration of photodetector arrays, and therefore they are promising to be an alternative to the bulky and fragile photomultiplier tubes for weak signal detection in deep-ultraviolet region. Here, by deliberate lattice and band engineering, we construct an n-Barrier-n unipolar barrier avalanche photodetector consisting of β -Ga 2 O 3 /MgO/Nb:SrTiO 3 heterostructure, in which the enlarged conduction band offsets fortify the reverse breakdown and suppress the dark current while the negligible valance band offsets faciliate minority carrier flow across the heterojunction. The developed…
Citation impact
- FWCI
- 23.89
- Percentile
- 100%
- References
- 41
Authors
14- QZQingyi Zhang
Beijing University of Posts and Telecommunications
- NLNing Li
Beijing University of Posts and Telecommunications
- TZTao Zhang
Beijing University of Posts and Telecommunications
- DDDianmeng Dong
Beijing University of Posts and Telecommunications
- YYYongtao Yang
Beijing University of Posts and Telecommunications
Topics & keywords
- Photodetector
- Optoelectronics
- Heterojunction
- Silicon photomultiplier
- Materials science
- Photomultiplier
- Dark current
- Avalanche photodiode