光致发光
激子
兴奋剂
材料科学
钙钛矿(结构)
纳米线
掺杂剂
奥斯特瓦尔德成熟
化学物理
发光
量子产额
光电子学
纳米技术
凝聚态物理
结晶学
化学
光学
物理
荧光
作者
Mingyan Chen,Xinxin Han,Ke Xing,Yusheng Song,Sheng Cao,Bingsuo Zou,Jinju Zheng,Jialong Zhao
标识
DOI:10.1021/acs.jpclett.3c03036
摘要
Mn2+ doped perovskite nanocrystals have garnered significant attention in optoelectronic applications. However, the synthesis of Mn2+ doped perovskite nanowires (NWs) poses challenges, and the dynamics of energy transfer from the exciton to Mn2+ remains unexplored, which is crucial for optimizing Mn2+ luminescence efficiency. Herein, we present a method to synthesize Mn2+ doped CsPbBr3 NWs with a photoluminescence quantum yield of 52% by diffusing Mn2+ into seed CsPbBr3 NWs grown via a hot injection method. We control the solution and lattice chemical potentials of Pb2+ and Mn2+ to enable Mn2+ to diffuse into the CsPbBr3 NWs while minimizing Ostwald ripening. Variable temperature photoluminescence spectroscopy reveals that the energy transfer from the exciton to Mn2+ in Mn2+ doped CsPbBr3 NWs is temperature dependent. A dynamic competition is observed between energy transfer and backward energy transfer, resulting in stronger Mn2+ photoluminescence at 80 K. This work provides a specific synthesis pathway for Mn2+ doped CsPbBr3 NWs and sheds light on their exciton-to-Mn2+ energy transfer dynamics.
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