1. Low toxicity antisolvent synthesis of composition-tunable luminescent all-inorganic perovskite nanocrystals.
- Author
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Li, Wen, Deng, Wen, Fan, Xiaoqiang, Chun, Fengjun, Xie, Meilin, Luo, Chao, Yang, Shiyu, Osman, Hanan, Liu, Chuanqi, Zheng, Xiaotong, and Yang, Weiqing
- Subjects
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LUMINESCENCE , *NANOCRYSTALS , *PEROVSKITE , *ETHYL silicate , *MONOCHROMATIC filters - Abstract
All-inorganic perovskite nanocrystals have held great promise as incredibly effective luminescent materials and also have been synthesized efficiently by room temperature approaches. Toluene, a high toxicity solvent, is often used as a valid antisolvent in ligand-assisted reprecipitation strategy, which badly restricts the commercial application of this convenient method. Here, aiming to address the toluene toxicity issue, the low toxic tetraethyl orthosilicate (TEOS) is employed as a new alternative antisolvent to achieve high uniform and composition dependent luminescent all-inorganic perovskite Cs 4 PbX 6 (X = I, Br, Cl) combined with CsPbX 3 (X = I, Br, Cl) nanocrystals with tunable emission large-span wavelengths (626–437 nm) and remarkably narrow full width at half-maximum (FWHM) monochromaticity (down to 19 nm). Meanwhile, the ratio of CsBr to PbBr 2 is proved to be a critical factor to control the crystalline phase of the resulting perovskite nanocrystals. Additionally, one monochromatic light-emitting diode (LED) lamp with brightly pure green emission is fabricated based on bromine-based perovskite nanocrystals. This newly developed low toxicity antisolvent synthesis (LTaS) is suitable candidate for commercial production in an environmentally-friendly way, and the as-obtained perovskite materials with superior optical merits will be brought to the forefront of lighting and displays. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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