光致发光
钙钛矿(结构)
材料科学
纳米晶
发光
卤化物
透射电子显微镜
超声
Crystal(编程语言)
化学工程
纳米技术
分析化学(期刊)
化学
无机化学
结晶学
光电子学
有机化学
工程类
计算机科学
程序设计语言
作者
Yu Tong,Eva Bladt,Meltem F. Aygüler,Aurora Manzi,Karolina Z. Milowska,Verena A. Hintermayr,Pablo Docampo,Sara Bals,Alexander S. Urban,Lakshminarayana Polavarapu,Jochen Feldmann
标识
DOI:10.1002/anie.201605909
摘要
Abstract We describe the simple, scalable, single‐step, and polar‐solvent‐free synthesis of high‐quality colloidal CsPbX 3 (X=Cl, Br, and I) perovskite nanocrystals (NCs) with tunable halide ion composition and thickness by direct ultrasonication of the corresponding precursor solutions in the presence of organic capping molecules. High angle annular dark field scanning transmission electron microscopy (HAADF‐STEM) revealed the cubic crystal structure and surface termination of the NCs with atomic resolution. The NCs exhibit high photoluminescence quantum yields, narrow emission line widths, and considerable air stability. Furthermore, we investigated the quantum size effects in CsPbBr 3 and CsPbI 3 nanoplatelets by tuning their thickness down to only three to six monolayers. The high quality of the prepared NCs (CsPbBr 3 ) was confirmed by amplified spontaneous emission with low thresholds. The versatility of this synthesis approach was demonstrated by synthesizing different perovskite NCs.
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