Surface states and its influence on luminescence in ZnS nanocrystallite

	Surface states and its influence on luminescence in ZnS nanocrystallite
其他题名	论文其他题名
	Zhang X. B.; Song H. W.; Yu L. X.; Wang T.; Ren X. G.; Kong X. G.; Xie Y. H.; Wang X. J.
	2006
发表期刊	Journal of Luminescence
ISSN	0022-2313
卷号	118 期号:2 页码:251-256
摘要	In this paper the influence of surface effects on the self-activated (SA) luminescence in ZnS nanoparticles prepared by the wet-chemical method is presented. It is observed that the luminescence of SA decreases dramatically by rinsing with methanol. In the rinsed sample, the luminescence of SA increases more by ultraviolet (UV) light irradiation. To clarify its origin, the Raman spectra and electron paramagnetic resonance (EPR) are studied. The results demonstrate that the vibrational modes assigned to organic functional groups of -OH and -COO and -CH(3) decreases remarkably by rinsing, while the EPR signal originated from the unpaired electrons of some transition metal impurity ions including Mn(2+) increases. It is suggested that the SA centers prefer to occupy the sites near the surface and that the donor of SA emission may be partly related to the organic functional groups of -OH and -COO adsorbed on the surface. The surface-dangling bonds caused by unpaired electrons of some transition metal impurity ions play a role of surface states, leading to the quenching of the SA emissions. The organic functional groups chemically combine with these surface-dangling bonds leading to the decrease in surface states and surface nonradiative relaxation channels and to the increase in the SA emissions. (c) 2005 Elsevier B.V. All rights reserved.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26724
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang X. B.,Song H. W.,Yu L. X.,et al. Surface states and its influence on luminescence in ZnS nanocrystallite[J]. Journal of Luminescence,2006,118(2):251-256.
APA	Zhang X. B..,Song H. W..,Yu L. X..,Wang T..,Ren X. G..,...&Wang X. J..(2006).Surface states and its influence on luminescence in ZnS nanocrystallite.Journal of Luminescence,118(2),251-256.
MLA	Zhang X. B.,et al."Surface states and its influence on luminescence in ZnS nanocrystallite".Journal of Luminescence 118.2(2006):251-256.

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