Photoluminescence of Eu2+ Doped ZnS Nanocrystals

• 来源期刊: 中国物理快报(英文版)
• 年，卷（期）: 2000,（8）
• 所属期刊栏目: Condensed matter: electronic structure,
• 页码范围: 609-611
• 页数: 3页
• 语种: 英文

摘要

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.