QUANTUM SIZE EFFECTS AND OPTICAL PROPERTIES OF PbS SEMICONDUCTOR ULTRAFINE PARTICLES
Zhao Jialong Zhang Jisen Jin Chunming Zhou Fangce Gao Ying Huang Shihua Yu Jiaqi(Changchun Institute of Physics, Academia Sinica, Changchun 130021)Zou Bingsuo Li Shoutian Xiao Liangzhi(Department of Chemistry, Jilin University, Changchun 130023)
Quantum size effects and optical properties of PbS semiconductor ultrafine particles as well as the influence of the surrounding dielectric environment on their optical properties were investigated. It was found that the surface defects were effectively removed and the luminescence intensity of the particles was enhanced by surface modification. Experimental results are discussed with the tight-binding model.