材料科学
光致发光
量子产额
掺杂剂
钙钛矿(结构)
热稳定性
钝化
纳米晶
三乙氧基硅烷
兴奋剂
发光二极管
化学工程
纳米技术
分析化学(期刊)
光电子学
化学
光学
有机化学
荧光
复合材料
工程类
物理
图层(电子)
作者
Xianli Li,Yan Guo,Binbin Luo
出处
期刊:Crystals
[MDPI AG]
日期:2017-12-23
卷期号:8 (1): 4-4
被引量:23
摘要
Organic–inorganic CH3NH3PbCl3 perovskite nanocrystals (PNCs) doped with Mn2+, CH3NH3PbxMn1−xCl3, have been successfully prepared using a reprecipitation method at room temperature. Structural and morphological characterizations reveal that the CH3NH3PbxMn1−xCl3 PNCs with cubic phase transforms from particles to cubes and increases in size from 16.2 ± 4.4 nm in average diameter to 25.3 ± 7.2 nm in cubic length after the addition of Mn2+ precursor. The CH3NH3PbxMn1−xCl3 PNCs exhibit a weak exciton emission at ~405 nm with a low absolute quantum yield (QY) of around 0.4%, but a strong Mn2+ dopant emission at ~610 nm with a high QY of around 15.2%, resulting from efficient energy transfer from the PNC host to the Mn2+ dopant via the 4T1→6A1 transition. In addition, the thermal and air stability of CH3NH3PbxMn1−xCl3 PNCs are improved due to the passivation with (3-aminopropyl) triethoxysilane (APTES), which is important for applications such as light emitting diodes (LEDs).
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