Pressure behaviour of the UV and green emission bands in ZnO micro-rods

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	Pressure behaviour of the UV and green emission bands in ZnO micro-rods
	Li GH ; Su FH ; Wang WJ ; Ding K ; Chen W ; Liu YF ; Joly AG
刊名	physica status solidi b-basic solid state physics
	2007
卷号	244 期号:1 页码:87-92
关键词	OPTICAL-PROPERTIES
ISSN号	issn: 0370-1972
通讯作者	li, gh, chinese acad sci, inst semicond, state key lab superlattices & microstruct, pob 912, beijing 100083, peoples r china. 电子邮箱地址: ghli@red.semi.ac.cn ; weichen@uta.edu
中文摘要	the pressure behavior of the ultraviolet (uv) and green emission bands in zno tetrapod-like micro-rods has been investigated at 300 and 70 k, respectively. the pressure coefficient of the uv band at 300 k is 24.5 mev/gpa, consistent with that of the band gap of bulk zno. however, the pressure coefficient of the green band is 25 mev/gpa, far larger than previous literature reports. the green band in this work originates from cu-related emission, as confirmed by the fine structure observed in the spectra at 10 k. the pressure coefficients of four phonon replicas of the free exciton emission (fx) at 70 k are 21.0, 20.2, 19.8, and 19.3 mev/gpa, respectively. the energy shift rate of the fx emission and the lo phonon energies is then determined to be 21.4 and 0.55 mev/gpa. the pressure coefficient of the neutral donor bound exciton ((dx)-x-0) transition is 20.5 mev/gpa, only 4% smaller than that of fx. this confirms that the (dx)-x-0 emission corresponds to excitons bound to neutral shallow donors. (c) 2007 wiley-vch verlag gmbh & co. kgaa, weinheim.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-03-29
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/9698]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Li GH,Su FH,Wang WJ,et al. Pressure behaviour of the UV and green emission bands in ZnO micro-rods[J]. physica status solidi b-basic solid state physics,2007,244(1):87-92.
APA	Li GH.,Su FH.,Wang WJ.,Ding K.,Chen W.,...&Joly AG.(2007).Pressure behaviour of the UV and green emission bands in ZnO micro-rods.physica status solidi b-basic solid state physics,244(1),87-92.
MLA	Li GH,et al."Pressure behaviour of the UV and green emission bands in ZnO micro-rods".physica status solidi b-basic solid state physics 244.1(2007):87-92.