Photogenerated carriers transport behaviors in L-cysteine capped ZnSe core-shell quantum dots

	Photogenerated carriers transport behaviors in L-cysteine capped ZnSe core-shell quantum dots
	Shan, Qingsong 1; Li, Kuiying 1; Xue, Zhenjie 2; Lin, Yingying 1; Yin, Hua 1; Zhu, Ruiping 1
刊名	JOURNAL OF APPLIED PHYSICS
	2016-02-07
卷号	119 期号:5
英文摘要	The photoexcited carrier transport behavior of zinc selenide (ZnSe) quantum dots (QDs) with core-shell structure is studied because of their unique photoelectronic characteristics. The surface photovoltaic (SPV) properties of self-assembled ZnSe/ZnS/L-Cys core-shell QDs were probed via electric field induced surface photovoltage and transient photovoltage (TPV) measurements supplemented by Fourier transform infrared, laser Raman, absorption, and photoluminescence spectroscopies. The ZnSe QDs displayed p-type SPV characteristics with a broader stronger SPV response over the whole ultraviolet-to-near-infrared range compared with those of other core-shell QDs in the same group. The relationship between the SPV phase value of the QDs and external bias was revealed in their SPV phase spectrum. The wide transient photovoltage response region from 3.3 x 10(-8) to 2 x 10(-3) s was closely related to the long diffusion distance of photoexcited free charge carriers in the interfacial space-charge region of the QDs. The strong SPV response corresponding to the ZnSe core mainly originated from an obvious quantum tunneling effect in the QDs. (C) 2016 AIP Publishing LLC.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/33821]
专题	化学研究所_活体分析化学实验室
作者单位	1.Yanshan Univ, State Key Lab Metastable Mat Manufacture Technol, Qinhuangdao 066004, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Analyt Chem Living Biosyst, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Shan, Qingsong,Li, Kuiying,Xue, Zhenjie,et al. Photogenerated carriers transport behaviors in L-cysteine capped ZnSe core-shell quantum dots[J]. JOURNAL OF APPLIED PHYSICS,2016,119(5).
APA	Shan, Qingsong,Li, Kuiying,Xue, Zhenjie,Lin, Yingying,Yin, Hua,&Zhu, Ruiping.(2016).Photogenerated carriers transport behaviors in L-cysteine capped ZnSe core-shell quantum dots.JOURNAL OF APPLIED PHYSICS,119(5).
MLA	Shan, Qingsong,et al."Photogenerated carriers transport behaviors in L-cysteine capped ZnSe core-shell quantum dots".JOURNAL OF APPLIED PHYSICS 119.5(2016).