Β-Ga2O3 nanorod arrays with high light-to-electron conversion for solar-blind deep ultraviolet photodetection. Issue 11 (19th February 2019)

• Record Type: Journal Article
• Authors: Wang, Shunli; Chen, Kai; Zhao, Hailin; He, Chenran; Wu, Chao; Guo, Daoyou; Zhao, Nie; Ungar, Goran; Shen, Jingqin; Chu, Xulong; Li, Peigang; Tang, Weihua
• Is Part Of: RSC advances. Volume 9:Issue 11(2019)
• Page Start: 6064
• Page End: 6069
• Publication Date: 2019-02-19
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra10371b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Vertically aligned β-Ga2 O3 nanorod arrays with high light coupling and rapid electron transport were assembled for solar-blind deep UV detection. Abstract : Vertically aligned nanorod arrays (NRAs), with effective optical coupling with the incident light and rapid electron transport for photogenerated carriers, have attracted much interest for photoelectric devices. Herein, the monoclinic β-Ga2 O3 NRAs with an average diameter/length of 500 nm/1.287 μm were prepared by the hydrothermal and post-annealing method. Then a circular Ti/Au electrode was patterned on β-Ga2 O3 NRAs to fabricate solar-blind deep ultraviolet photodetectors. At zero bias, the device shows a photoresponsivity ( R λ ) of 10.80 mA W −1 and a photo response time of 0.38 s under 254 nm light irradiation with a light intensity of 1.2 mW cm −2, exhibiting a self-powered characteristic. This study presents a promising candidate for use in solar-blind deep ultraviolet photodetection with zero power consumption.