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Fast-response solar-blind ultraviolet photodetector with a graphene/β-Ga2O3/graphene hybrid structure

Ai, Meilin ; Guo, Daoyou ; Qu, Yingyu ; Cui, Wei ; Wu, Zhenping ; Li, Peigang ; Li, Linghong ; Tang, Weihua

Journal of alloys and compounds, 2017-01, Vol.692, p.634-638 [Periódico revisado por pares]

Lausanne: Elsevier B.V

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Título:
Fast-response solar-blind ultraviolet photodetector with a graphene/β-Ga2O3/graphene hybrid structure
Autor: Ai, Meilin ; Guo, Daoyou ; Qu, Yingyu ; Cui, Wei ; Wu, Zhenping ; Li, Peigang ; Li, Linghong ; Tang, Weihua
Assuntos: Chemical compounds ; Decay rate ; Ga2O3 ; Gallium oxides ; Graphene ; Laser beams ; Laser molecular beam epitaxy technique ; Molecular beam epitaxy ; Optoelectronic devices ; Photometers ; Sensors ; Sheets ; Thin films ; Ultraviolet detectors ; Ultraviolet photodetector ; Ultraviolet radiation
É parte de: Journal of alloys and compounds, 2017-01, Vol.692, p.634-638
Descrição: A high performance vertical solar-blind ultraviolet photodetector based on β-Ga2O3 thin films sandwiched between two graphene sheets has been fabricated by laser molecular beam epitaxy. The photodetector exhibits obvious rectifying characteristics and excellent solar-blind UV photoresponse. The fast rising and decay time of our detector are 0.96 s and 0.81 s under 254 nm illumination. The ratio of I254/Idark is up to 82.88 and the responsivity of graphene/β-Ga2O3/graphene photodetector increases to 9.66 A/W at 10 V bias. Our results suggest that this performance is attributed to the existence of Schottky barriers between β-Ga2O3 and two graphene sheets. The combination of Ga2O3 and graphene might open up new possibilities for future UV integrated optoelectronic devices. •Mainly (2¯ 01) oriented β-Ga2O3 thin films have been grown on graphene/Al2O3 stack by L-MBE.•A vertical sandwich structure of graphene/β-Ga2O3 thin films/graphene as a potential solar-blind photodetector is formed.•The high performance of the photodetector is obtained due to the existence of Schottky barriers.
Editor: Lausanne: Elsevier B.V
Idioma: Inglês

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Fast-response solar-blind ultraviolet photodetector with a graphene/β-Ga2O3/graphene hybrid structure

Ai, Meilin ; Guo, Daoyou ; Qu, Yingyu ; Cui, Wei ; Wu, Zhenping ; Li, Peigang ; Li, Linghong ; Tang, Weihua

Lausanne: Elsevier B.V

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