title: Solar-Blind Avalanche Photodetector Based On Single ZnO-Ga₂O₃ Core-Shell Microwire.
abstract: High-performance solar-blind (200-280 nm) avalanche photodetectors (APDs) were fabricated based on highly crystallized ZnO-Ga2O3 core-shell microwires. The responsivity can reach up to 1.3 × 10(3) A/W under -6 V bias. Moreover, the corresponding detectivity was as high as 9.91 × 10(14) cm·Hz(1/2)/W. The device also showed a fast response, with a rise time shorter than 20 μs and a decay time of 42 μs. The quality of the detectors in solar-blind waveband is comparable to or even higher than that of commercial Si APD (APD120A2 from Thorlabs Inc.), with a responsivity ∼8 A/W, detectivity ∼10(12) cm·Hz(1/2)/W, and response time ∼20 ns. The high performance of this APD make it highly suitable for practical applications as solar-blind photodetectors, and this core-shell microstructure heterojunction design method would provide a new approach for realizing an APD device.
authors.affiliation: †State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun 130033, People's Republic of China.|‡Graduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhao
authors.affiliation: †State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun 130033, People's Republic of China.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.affiliation: §Department of Materials Science, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Chen
authors.affiliation: †State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun 130033, People's Republic of China.
authors.forename: Yunpeng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: †State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun 130033, People's Republic of China.
authors.forename: Mingming
authors.initials: M
authors.lastname: Jiang
authors.affiliation: §Department of Materials Science, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Xiaosheng
authors.initials: X
authors.lastname: Fang
authors.affiliation: †State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun 130033, People's Republic of China.
authors.forename: Dongxu
authors.initials: D
authors.lastname: Zhao
keywords: avalanche photodectors; core−shell microwires; solar-blind photodetectors