Ionic environment control of visible photoluminescence from ZnO nanoparticles

被引：27

作者：

Ghosh, Manoranjan ^{[1
]}

Raychaudhuri, A. K. ^{[1
]}

机构：

[1] SN Bose Natl Ctr Basic Sci, DST Unit Nanosci, Kolkata 700098, India

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 12期

关键词：

D O I：

10.1063/1.2987479

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report that the visible photoluminescence from ZnO nanoparticles can be controlled by changing the ionic or polar nature of the medium in which the nanoparticles are dispersed. We find that the presence of sufficient amount of electrolyte can even quench the emission. An explanation is proposed based on the surface charge of the ZnO nanoparticles, which controls the band bending in the depletion layer at the surface. The band bending in turn, decides the predominant nature of the visible emission. The explanation is validated by establishing a direct correlation between the visible emission and the zeta potential. (C) 2008 American Institute of Physics.

引用

页数：3

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