摘要
本文研究了BiI_3半导体溶胶的光学性质.进一步证实,在BiI_3胶体样品中,真实的BiI_3半导体微晶粒予的吸收被强的I_3^-离子吸收掩盖了.通过测量激发光谱,确定了BiI_3微晶的吸收位置.用光谱数据计算得到的尺寸分布与电镜结果和理论分析符合得很好.得到的结果表明,BiI_3胶体中的BiI_3微晶与体材料相比。存在着显著的量子尺寸效应.
In this paper, the optical properties of BiI3 semiconductor colloids were investigated. The absorption spectra of BiI3 colloids and I2-alcohol solution were compared. It is verified that the absorption of BiI3 ultra-fine particles is covered by the strong absorption of I; ion. In the emission spectra of BiI3 colloids, the luminescence due to hexadecyl-pyridine was observed. Because of energy transfer between surface of BiI3 micro-crystals and hexadecyl-pyridine, we observed the absorption of BiI3 microcrystals by measuring the excitation spectra. The size distribution calculated by measured data is in good agreement with theoretical one. The experimental results indicate that there exist profound quantum size effects in BiI3 colloids.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1993年第4期355-360,共6页
Chinese Journal of Luminescence
关键词
超微粒子
光致发光
尺度效应
微晶
ultrafine particles
quantum size effect
photoluminescence
