卤化物
镧系元素
钙钛矿(结构)
纳米颗粒
兴奋剂
材料科学
铯
无机化学
物理化学
化学
结晶学
纳米技术
离子
光电子学
有机化学
作者
Gouranga H. Debnath,Brian P. Bloom,Susheng Tan,David H. Waldeck
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:14 (16): 6037-6051
被引量:11
摘要
This study presents a halide exchange mediated cation exchange strategy for a room temperature doping of trivalent lanthanide cations (Ln3+) in cesium lead halide (CsPbX3) nanoparticles (NPs). Post-synthetic addition of LnCl3 [Ln = Nd, Sm, Eu, Tb, Dy, and Yb] to a solution of CsPbBr3 NPs generates the corresponding lanthanide doped NPs which display host sensitized Ln3+ emission. Structural and spectroscopic characterizations indicate a successful halide exchange and substitutional displacement of Pb2+ by Ln3+. The effect of halide identity in controlling the Ln3+ sensitization was also evaluated. A photophysical framework is presented that can be used to predict the Ln3+ sensitization in perovskite NPs semiempirically, thereby removing the constraints of trial and error in designing a perovskite NP-Ln3+ host-guest combination.
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