Growth mechanism of CsPbBr3 perovskite nanocrystals by a co-precipitation method in a CSTR system
Growth mechanism of CsPbBr3 perovskite nanocrystals by a co-precipitation method in a CSTR system
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CSTR系统中共沉淀法CsPbBr3钙钛矿纳米晶的生长机理
DOI：
10.1007/s12274-018-2190-x
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发表时间：
2019-01-01
期刊：
影响因子：
9.9
通讯作者：
Tu, Guoli
中科院分区：
文献类型：
--
作者：
Zhang, Jibin;Fan, Lianwei;Tu, Guoli
采用连续搅拌槽反应器（CSTR）系统中的过饱和重结晶共沉淀法，研究了CsPbBr3钙钛矿纳米晶的生长机理。通过改变反应条件可以控制反应速率，这有助于我们观察重要的中间阶段，以深入了解这些NC的生长机制。详细讨论了温度、配体浓度（油胺和油酸）以及前驱体浓度对CsPbBr3纳米晶生长过程的影响。在此基础上，从动力学和热力学两个方面对CsPbBr3纳米晶的生长机理进行了研究。该生长机理对大规模合成具有指导意义。将合成的CsPbBr 3纳米碳用于制备白色发光二极管和量子点发光二极管，测试其光电性能，结果表明CsPbBr 3纳米碳在光电子学应用中具有很好的前景。
A co-precipitation method based on supersaturated recrystallization in a continuous stirred-tank reactor (CSTR) system was applied to uncover the growth mechanism of CsPbBr3 perovskite nanocrystals (NCs). The reaction rate can be controlled by changing the reaction conditions in this CSTR system, which helps us to observe important intermediate stages to gain insight into the growth mechanism of these NCs. The effects of the temperature, concentrations of the ligands (oleylamine and oleic acid), and precursor concentrations during the growth process of CsPbBr3 NCs were discussed in detail. Further, the growth mechanism of CsPbBr3 NCs was investigated in terms of the dynamics and thermodynamics on the basis of experimental results. The growth mechanism is a useful guide to large-scale synthesis. The synthesized CsPbBr3 NCs were employed for fabrication of both white light-emitting diodes and quantum-dot light-emitting diodes to test their photoelectric properties; the results show that CsPbBr3 NCs show great promise for optoelectronics applications.