摘要
本文研究了表面修饰的Cu_2O半导体超微粒子的光学性质.在Cu_2O超微粒子中未观察到显著的量子尺寸效应,但测量到很强的宽带光致发光,且随着激发波长变短,其发光带的峰位蓝移,发光带宽度增加.最后,分析了Cu_2O超微粒子的宽带发光机制,并讨论了热处理对超微粒子的发光强度的影响.
Optical properties of Cu2O semiconductor ultrafine particles with surface modification were investigated by measuring the absorption, photoluminescence and excitation spectra at room temperature. No obvious quantum size effect was observed in the Cu2O ultrafine particles, but very strong and broad photoluminescence bands were observed. The peak positions of the photoluminescence bands were shifted to short wavelength and the widthes of the bands were increased with decreasing excitation wavelenth. Finally, we analyze the mechanisms of the broad photol-uminescenee bands in Cu2O ultafine particles and discuss the influence of heat treatment on the intensity of the luminscence of the ultrafine particles.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1993年第2期154-158,共5页
Chinese Journal of Luminescence
基金
国家自然科学基金
中国科学院长春物理研究所激发态物理开放实验室基金
关键词
半导体
超微粒子
光致发光
激子
Cu2O semiconductor
ultrafine particles
photoluminescence
exciton
