Photoluminescence and time-resolved photoluminescence of star-shaped ZnO nanostructures

	Photoluminescence and time-resolved photoluminescence of star-shaped ZnO nanostructures
	Li, CP; Guo, L; Wu ZY(吴自玉); Wu, ZY; Ren, LR; Ai, XC; Zhang, JP; Lv, Y; Xu, HB; Yu, DP
刊名	SOLID STATE COMMUNICATIONS
	2006
卷号	139 期号:7 页码:355-359
关键词	ZnO stimulated emission temperature-dependent photoluminescence time-resolved photoluminescence
通讯作者	Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100083, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China ; Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China ; Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
英文摘要	Optical properties of star-shaped ZnO nanostructures were studied. The temperature-dependent photoluminescence (PL) was examined up to fourth-order longitudinal optical (LO) phonon assisted emissions of free excitons and confirmed that the nature of the room temperature PL in ZnO is 1-LO phonon assisted emission of free excitons. Low threshold ultraviolet stimulated emissions (SE) were obtained for our powder samples at room temperature. Picosecond time-resolved PL measurements detected a bi-exponential decay behavior which is strongly dependent on the excitation intensity: the slow decay term decreased faster than the fast decay term as the excitation intensity increased and the emission decays were dominated by the fast one. We also found that the emission decays decreased super-linearly before the appearance of the SE. This behavior may be used to deduce the threshold of SE or lasing. (c) 2006 Elsevier Ltd. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Condensed Matter
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000240540200007
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/237122]
专题	高能物理研究所_多学科研究中心高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li, CP,Guo, L,Wu ZY,et al. Photoluminescence and time-resolved photoluminescence of star-shaped ZnO nanostructures[J]. SOLID STATE COMMUNICATIONS,2006,139(7):355-359.
APA	Li, CP.,Guo, L.,吴自玉.,Wu, ZY.,Ren, LR.,...&Yu, DP.(2006).Photoluminescence and time-resolved photoluminescence of star-shaped ZnO nanostructures.SOLID STATE COMMUNICATIONS,139(7),355-359.
MLA	Li, CP,et al."Photoluminescence and time-resolved photoluminescence of star-shaped ZnO nanostructures".SOLID STATE COMMUNICATIONS 139.7(2006):355-359.