Journal
MATERIALS TODAY COMMUNICATIONS
Volume 25, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtcomm.2020.101532
Keywords
Sol-gel method; Solar blind photodetectors; Gallium oxide films
Categories
Funding
- National Natural Science Foundation of China [61874084, 61704125, 61974119, 61904146]
- Fundamental Research Funds for the Central Universities [XJS191102]
- Natural Science Foundation of Shannxi Province, China [2020JQ-302]
Ask authors/readers for more resources
Ga2O3 has been receiving more and more attention for solar blind photodetectors due to it has a large direct bandgap corresponding to solar blind waveband. However, numerous photodetectors based on single crystalline Ga2O3 exhibited a relatively large dark current and a low photo-to-dark current ratio. Herein, the alpha/beta phase polycrystalline Ga2O3 thin film was successfully synthesized via sol-gel method and the photodetector with low dark current(18.5 pA at 15 V) and high photo-to-dark current ratio(1664) was further fabricated. By optimizing annealing environment, the photodetector also exhibited an excellent detectivity (D*) of 5.41 x 10(11) Jones and a fast photo-response speed (a rise time of 0.03 s/0.23 s and a decay time of 0.04 s/0.41 s). Excellent performance can be ascribed to that tailoring of the defect concentration in the polycrystalline Ga2O3 film by introducing-Ga2O3 into-Ga2O3 and the physical mechanism was discussed with a carrier transport model. The experimental results suggested the great potential applications of Ga2O3 thin films synthesized by the sol-gel method in ultraviolet detection and our experiment reveals an effective method for manufacturing high-performance solar blind photodetectors.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available