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	A hybrid photodetector of graphene/TiO2/inorganic PbS quantum dots for fast response
	Ge,Bangtong1; Nie,Changbin2; Shen,Jun2
	2022-03-17
摘要	Abstract Hybrid graphene/quantum dots photodetectors have been obtained up to 109 A W?1 ultrahigh responsivity, but the major challenge of these architectures is the slow photoresponse speed, especially the delay time of these configurations is mostly on the second time scale. Herein, we propose a hybrid photodetector of graphene/TiO2 films/inorganic PbS quantum dots, which bridge the gap between high sensitivity and fast response time at visible band detection. Under 635 nm light illumination, the device shows a high responsivity of 1.2?×?104 A W?1, a fast decay time of 35 ms, and a specific detectivity of 1.5?×?1012 Jones at 1 V bias. The high responsivity is ascribed to the photogating effect, and the major findings hold great promise for application in optoelectronics.
关键词	photodetector graphene PbS quantum dots photogating effect
DOI	10.35848/1347-4065/ac56fc
发表期刊	Japanese Journal of Applied Physics
ISSN	0021-4922
卷号	61期号:4
通讯作者	Ge,Bangtong() ; Shen,Jun()
WOS记录号	IOP:jjap_61_4_040903
语种	英语