ic7b02941_si_001.pdf (2.42 MB)
Download fileGeneral Strategy for Rapid Production of Low-Dimensional All-Inorganic CsPbBr3 Perovskite Nanocrystals with Controlled Dimensionalities and Sizes
journal contribution
posted on 2018-01-24, 12:21 authored by Wenna Liu, Jinju Zheng, Sheng Cao, Lin Wang, Fengmei Gao, Kuo-Chih Chou, Xinmei Hou, Weiyou YangCurrently,
all-inorganic CsPbX3 (X = Br, I, Cl) perovskite nanocrystals
(NCs) are shining stars with exciting potential applications in optoelectronic
devices such as solar cells, light-emitting diodes, lasers, and photodetectors,
due to their superior performance in comparison to their organic–inorganic
hybrid counterparts. In the present work, we report a general strategy
based on a microwave technique for the rapid production of low-dimensional
all-inorganic CsPbBr3 perovskite NCs with tunable morphologies
within minutes. The effect of the key parameters such as the introduced
ligands, solvents, and PbBr2 precursors and microwave powers
as well as the irradiation times on the production of perovskite NCs
was systematically investigated, which allowed their growth with tunable
dimensionalities and sizes. As a proof of concept, the ratio of OA
to OAm as well as the concentration of PbBr2 precursor
played important roles in triggering the anisotropic growth of the
perovskite NCs, favoring their growth into 1D/2D single-crystalline
nanostructures. Meanwhile, their sizes could be tailored by controlling
the microwave powers and irradiation times. The mechanism for the
tunable growth of perovskite NCs is discussed.