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Crystallization Behavior and Luminescence of Inkjet Printing CH3NH3PbBr3
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-05-29 , DOI: 10.1002/crat.202100004
Rui Sun 1 , Haixia Li 1 , Yimin Guan 2 , Yong Du 1 , Hui Shen 1 , Jiayue Xu 1
Affiliation  

Lead halide perovskites display remarkable optoelectronic properties, like large absorption coefficients, high photoluminescence quantum efficiencies, and long lifetime and diffusion length of photocarriers. This system is easily fabricated using solution processes and inkjet printing is an effective way to prepare halide perovskite films and complex patterns. In this work, the crystallization behaviors of inkjet printing CH3NH3PbBr3 crystals are systematically investigated with varied I doping, printing times, and solvents. Using N,N-dimethylformamide (DMF) solvent, CH3NH3PbBr3−xIx (x = 0, 0.14, 0.29, 0.45, 0.59) are printed on the glass and the crystalline grains are developed from the (001) oriented tetragonal in side length of 10–50 µm to dendrite with increasing I concentrations. The crystalline grains are kept tetragonal, while the average crystal size changes from 22 to 89 µm by increasing the number of printing from 10 to 1000 times. DMF and dimethyl sulfoxide (DMSO) are used as solvents for printing CH3NH3PbBr3, and more regular grains are obtained from DMF solvent. Several patterns are printed on glass and papers, and fluorescent two-dimensional (2D) patterns are observed under the 480 nm excitation. The as-printed patterns show excellent homogeneity and high reproducibility, indicating that the inkjet printing shows broad application prospects in flexible electronics.

中文翻译:

喷墨打印CH3NH3PbBr3的结晶行为和发光

卤化铅钙钛矿显示出显着的光电特性,如大吸收系数、高光致发光量子效率以及长寿命和光载流子扩散长度。该系统很容易使用溶液工艺制造,喷墨打印是制备卤化物钙钛矿薄膜和复杂图案的有效方法。在这项工作中,系统研究了喷墨印刷 CH 3 NH 3 PbBr 3晶体的结晶行为,其中包括不同的 I -掺杂、印刷时间和溶剂。使用N , N -二甲基甲酰胺 (DMF) 溶剂,CH 3 NH 3 PbBr 3− x Ix ( x  = 0, 0.14, 0.29, 0.45, 0.59) 被印刷在玻璃上,随着 I -浓度的增加,晶粒从边长为 10-50 µm 的 (001) 取向四方晶发展为枝晶。晶粒保持四方,而平均晶体尺寸从 22 到 89 µm 随印刷次数从 10 次增加到 1000 次而变化。DMF 和二甲亚砜 (DMSO) 用作印刷 CH 3 NH 3 PbBr 3 的溶剂,并且从 DMF 溶剂中获得更规则的颗粒。在玻璃和纸上印刷了几种图案,在 480 nm 激发下观察到荧光二维 (2D) 图案。打印出的图案显示出优异的均匀性和高再现性,表明喷墨打印在柔性电子领域显示出广阔的应用前景。
更新日期:2021-05-29
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