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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
2006
发表期刊SOLID STATE COMMUNICATIONS
卷号139期号:7页码:355-359
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
文章类型Article
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.
关键词ZnO stimulated emission temperature-dependent photoluminescence time-resolved photoluminescence
学科领域Physics
DOI10.1016/j.ssc.2006.06.029
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语种英语
WOS研究方向Physics
WOS类目Physics, Condensed Matter
WOS记录号WOS:000240540200007
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被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237122
专题多学科研究中心
作者单位中国科学院高能物理研究所
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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.
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