卤化物
纳米晶
钙钛矿(结构)
试剂
光致发光
化学
无机化学
离子
铵
材料科学
物理化学
纳米技术
结晶学
有机化学
光电子学
作者
Anirban Dutta,Rakesh Kumar Behera,Poulami Pal,Sujoy Baitalik,Narayan Pradhan
标识
DOI:10.1002/anie.201900374
摘要
In a generic synthesis approach, all three CsPbX3 (X=Cl, Br and I) perovskite nanocrystals having near unity quantum yields is reported. This has been achieved by injecting the desired amount of preformed alkylammonium halide salts which acted as a dual source providing halide ions and the capping agent to an equimolar amount of non-halide Pb and Cs precursors in a reaction flask at an optimized reaction temperature. The composition sensitivity of Pb to Cs ratio, high temperature reaction, and injection of ammonium halide remained the key parameters for obtaining the high quantum yields. Details of the reaction process, use of different reagents and setting up the reaction parameters are reported.
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