Controllable emission bands and morphologies of high-quality CsPbX3 perovskite nanocrystals prepared in octane
Controllable emission bands and morphologies of high-quality CsPbX3 perovskite nanocrystals prepared in octane
复制标题
辛烷中制备的高质量 CsPbX3 钙钛矿纳米晶的可控发射带和形貌
DOI：
10.1007/s12274-018-2046-4
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发表时间：
2018-03
期刊：
影响因子：
9.9
通讯作者：
Qu Junle
中科院分区：
文献类型：
--
作者：
Ye Shuai;Zhao Mengjie;Song Jun;Qu Junle
卤化物钙钛矿（CsPbX 3，X = Cl，Br，或I）量子点作为新型胶体纳米晶体（NC）受到越来越多的关注。准确控制发射带和NC形态是大多数CsPbX 3 NC实际应用的重要先决条件。因此，开发了在非极性溶剂辛烷中合成CsPbX 3（X = Cl、Br或I）NCs的简便方法。该过程在空气中在1090 °C下进行，以合成高质量的CsPbX 3 NC，其显示出12-44 nm宽的发射和超过90%的高光致发光量子产率。原位阴离子交换法被开发来调整CsPbX 3 NC光致发光发射，使用PbX 2溶解在辛烷作为卤化物源。通过在成核之前将特定的金属有机盐溶解在前体溶液中来控制NC形态，并且按照相同的一般方法获得纳米立方体、纳米点、纳米片、纳米片、纳米棒和纳米线，提供了控制CsPbX 3 NC发射带和形态的容易的、通用的途径，这将拓宽CsPbX 3 NC实际应用的范围。
Halide perovskite (CsPbX3, X = Cl, Br, or I) quantum dots have received increasing attention as novel colloidal nanocrystals (NCs). Accurate control of emission bands and NC morphologies are vital prerequisites for most CsPbX3 NC practical applications. Therefore, a facile method of synthesizing CsPbX3 (X = Cl, Br, or I) NCs in the nonpolar solvent octane was developed. The process was conducted in air at ∼ 90 °C to synthesize high-quality CsPbX3 NCs showing 12–44 nm wide emission and high photoluminescence quantum yield, exceeding 90%. An in situ anion-exchange method was developed to tune CsPbX3 NC photoluminescence emission, using PbX2 dissolved in octane as the halide source. NC morphology was controlled by dissolving specific metal–organic salts in the precursor solution prior to nucleation, and nanocubes, nanodots, nanosheets, nanoplatelets, nanorods, and nanowires were obtained following the same general method providing a facile, versatile route to controlling CsPbX3 NC emission bands and morphologies, which will broaden the range of CsPbX3 NC practical applications.
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