Synthesis of formamidinium lead halide perovskite nanocrystals through solid-liquid-solid cation exchange
Synthesis of formamidinium lead halide perovskite nanocrystals through solid-liquid-solid cation exchange
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DOI：
10.1039/c7tc00598a
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发表时间：
2017-06-21
影响因子：
6.4
通讯作者：
Chen, O.
中科院分区：
文献类型：
--
作者：
Hills-Kimball, K.;Nagaoka, Y.;Chen, O.
杂化有机-无机钙钛矿（HOIP）已经成为用于太阳能收集以及光电器件的有前途的材料。在这里，我们报告的HOIP纳米晶体（NC）的阳离子交换的第一个演示。在该反应中，甲基铵阳离子通过固-液-固阳离子交换反应被甲脒鎓阳离子取代甲基铵卤化铅（MAPbX（3））NC中的甲基铵阳离子。X射线衍射和光学表征允许密切监测这一过程。通过这种新型的阳离子交换反应，通过改变起始原料，合成了具有各种卤化物组成的甲脒卤化铅（FAPbX（3））NCs。这允许形成具有跨越395 nm至700 nm的宽范围发射的FAPbX（3）HOIP NC。
Hybrid organic-inorganic perovskites (HOIPs) have emerged as promising materials for applications in solar energy harvesting as well as in optoelectronic devices. Here, we report the first demonstration of cation exchange on HOIP nanocrystals (NCs). In this reaction, methylammonium cations are replaced in methylammonium lead halide (MAPbX(3)) NCs by formamidinium cations through a solid-liquid- solid cation exchange reaction. X-ray diffraction and optical characterizations allowed for the close monitoring of this process. Through this new type of cation-exchange reaction, formamidinium lead halide (FAPbX(3)) NCs with various halide compositions were synthesized by altering the starting material. This allowed for the formation of FAPbX(3) HOIP NCs with a wide range of emissions spanning from 395 nm to 700 nm.