LIU Shu-Man1, GUO Hai-Qing2, ZHANG Zhi-Hua2, LIU Feng-Qi1, WANG Zhan-Guo1
1Laboratory of Semiconductor Materials Sciences, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
2State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871
Photoluminescence of Eu2+ Doped ZnS Nanocrystals
LIU Shu-Man1;GUO Hai-Qing2;ZHANG Zhi-Hua2;LIU Feng-Qi1;WANG Zhan-Guo1
1Laboratory of Semiconductor Materials Sciences, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
2State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871
Abstract： Eu2+ doped ZnS nanocrystals exhibit new luminescence properties because of the enlarged energy gap of nanocrys-talline ZnS host due to quantum confinement effects. Photoluminescence emission at about 520nm from Eu2+ doped ZnS nanocrystals at room temperature is investigated by using photoluminescence emission and excitation spectroscopy Such green emission with long lifetime (ms) is proposed to be a result of excitation, ionization, carriers recapture and recombination via Eu2+ centers in nanocrystalline ZnS host.
2000, Vol. 17 
