Hole Surface Trapping Dynamics Directly Monitored by Electron Spin Manipulation in CdS Nanocrystals

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 强场激光物理国家重点实验室

	Hole Surface Trapping Dynamics Directly Monitored by Electron Spin Manipulation in CdS Nanocrystals
	Li, Xiao ; Feng, Donghai ; Tong, Haifang ; Jia, Tianqing ; Deng, Li ; Sun, Zhenrong ; Xu, Zhizhan
刊名	j. phys. chem. lett.
	2014
卷号	5 期号:24 页码:4310
关键词	SEMICONDUCTOR QUANTUM DOTS RATE FLUCTUATIONS FLUORESCENCE RELAXATION BLINKING RECOMBINATION NANOPARTICLES LUMINESCENCE TRANSITIONS STATE
通讯作者	feng, dh (reprint author), e china normal univ, state key lab precis spect, shanghai 200062, peoples r china.
英文摘要	a new detection technique, pump-spin orientation-probe ultrafast spectroscopy, is developed to study the hole trapping dynamics in colloidal cds nanocrystals. the hole surface trapping process spatially separates the electron-hole pairs excited by the pump pulse, leaves the core negatively charged, and thus enhances the electron spin signal generated by the orientation pulse. the spin enhancement transients as a function of the pump-orientation delay reveal a fast and a slow hole trapping process with respective time constants of sub-10 ps and sub-100 ps, orders of magnitude faster than that of carrier recombination. the power dependence of hole trapping dynamics elucidates the saturation process and relative number of traps, and suggests that there are three subpopulations of nanoparticles related to hole surface trapping, one with the fast trapping pathway only, another with the slow trapping pathway only, and the third with both pathways together.
收录类别	SCI
语种	英语
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.siom.ac.cn/handle/181231/13145]
专题	上海光学精密机械研究所_强场激光物理国家重点实验室
作者单位	1.[Li, Xiao 2.Feng, Donghai 3.Tong, Haifang 4.Jia, Tianqing 5.Deng, Li 6.Sun, Zhenrong] E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China 7.[Xu, Zhizhan] Chinese Acad Sci, State Key Lab High Field Laser Phys, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiao,Feng, Donghai,Tong, Haifang,et al. Hole Surface Trapping Dynamics Directly Monitored by Electron Spin Manipulation in CdS Nanocrystals[J]. j. phys. chem. lett.,2014,5(24):4310.
APA	Li, Xiao.,Feng, Donghai.,Tong, Haifang.,Jia, Tianqing.,Deng, Li.,...&Xu, Zhizhan.(2014).Hole Surface Trapping Dynamics Directly Monitored by Electron Spin Manipulation in CdS Nanocrystals.j. phys. chem. lett.,5(24),4310.
MLA	Li, Xiao,et al."Hole Surface Trapping Dynamics Directly Monitored by Electron Spin Manipulation in CdS Nanocrystals".j. phys. chem. lett. 5.24(2014):4310.