Ultrafast carrier dynamics in type-II ZnO-SnO heterostructure thin films

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	Ultrafast carrier dynamics in type-II ZnO-SnO heterostructure thin films
	Li, Zhong-guo; Cao, Hongtao; Song, Anran; Liang, Lingyan; Wu, Xingzhi; Yang, Junyi; Song, Ying-lin
刊名	APPLIED PHYSICS LETTERS
	2017
卷号	110 期号:17 页码:172102
ISSN号	0003-6951
英文摘要	We investigate the carrier relaxation and charge transfer dynamics in type-II ZnO-SnO heterojunction thin films using wavelength-dependent femtosecond transient absorption measurements. Under SnO-selective excitation conditions, absorption signals related to ZnO are observed on a subpico-second time scale, which indicates ultrafast electron transfer from SnO to ZnO. The spatial separation of electrons and holes across the ZnO-SnO interface leads to a long-lived carrier decay process with a lifetime of similar to 4 ns, 2 times longer than resonant excitation of both ZnO and SnO in the heterostructures. Our results provide a framework for understanding the photophysics of tin oxide semiconductor heterostructures. Published by AIP Publishing.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13873]
专题	2017专题
推荐引用方式 GB/T 7714	Li, Zhong-guo,Cao, Hongtao,Song, Anran,et al. Ultrafast carrier dynamics in type-II ZnO-SnO heterostructure thin films[J]. APPLIED PHYSICS LETTERS,2017,110(17):172102.
APA	Li, Zhong-guo.,Cao, Hongtao.,Song, Anran.,Liang, Lingyan.,Wu, Xingzhi.,...&Song, Ying-lin.(2017).Ultrafast carrier dynamics in type-II ZnO-SnO heterostructure thin films.APPLIED PHYSICS LETTERS,110(17),172102.
MLA	Li, Zhong-guo,et al."Ultrafast carrier dynamics in type-II ZnO-SnO heterostructure thin films".APPLIED PHYSICS LETTERS 110.17(2017):172102.