Nanocrystal seed-mediated synthesis of 2-monolayers, and thicker lead halide perovskite nanoplatelets without using A-site cation halide salt (AX; A=cesium, methylammonium, formamidinium and, X=Cl, Br, I) and long chain alkylammonium halide salts (LX; L=oleylammonium, octylammonium, butylammonium and, X=Cl, Br, I) has been demonstrated. The new facile synthesis method provides highly stable, monodisperse NPLs with narrow absorption and emission linewidths (min. 68 meV), and high PLQY (max. 37.6%).

中文翻译：

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胶体二维卤化物钙钛矿纳米片的种子介导合成

在不使用 A 位阳离子卤化物盐（AX；A=铯、甲基铵、甲脒和 X=Cl、Br、I）和长链烷基卤化铵盐的情况下，纳米晶种介导的 2 层卤化铅钙钛矿纳米片的合成(LX；L=油基铵、辛基铵、丁基铵和，X=Cl、Br、I)已被证明。新的简便合成方法可提供具有窄吸收和发射线宽（最小 68 meV）和高 PLQY（最大 37.6%）的高度稳定的单分散 NPL。