MORPHOLOGY OF POLYCRYSTALLINE ZNO AND ITS PHYSICAL-PROPERTIES

被引:61
作者
KOUDELKA, L [1 ]
HORAK, J [1 ]
JARIABKA, P [1 ]
机构
[1] SLOVAK,KOSECA 01864,SLOVAKIA
关键词
Electron spin resonance (ESR) - Green luminescence - Polycrystalline zinc oxide - Polydispersity - Ultraviolet luminescence;
D O I
10.1007/BF00368915
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Five commercial polycrystalline ZnO samples with different morphologies (nodular and needle-like) have been studied. Nodular ZnO crystallites reveal lower polydispersity, higher ultraviolet luminescence (380 nm), low green luminescence (500 nm), a small ESR signal with g=1.96 and a density close to the theoretical value for ZnO with the wurtzite structure. Needle-like ZnO crystallites have a higher polydispersity, higher green luminescence, higher ESR signal with g=1.96 and lower values of density. The observed differences in the physical properties are associated with the presence of oxygen vacancies in needle-like particles and probably also interstitial zinc atoms in nodular particles.
引用
收藏
页码:1497 / 1500
页数:4
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