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SiO 2 ‐improved stability of Mn‐doped CsPbBr 0.5 I 2.5 NC and their application for white LED
Author(s) -
He Meiling,
Liu Shengnan,
Ding Ling,
Zhang Zelong,
Liu Jianping,
Xiang Weidong,
Liang Xiaojuan
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16101
Subject(s) - doping , thermal stability , materials science , luminescence , nanocrystal , mesoporous material , composite number , perovskite (structure) , chemical engineering , analytical chemistry (journal) , nanotechnology , mineralogy , chemistry , optoelectronics , crystallography , composite material , chromatography , biochemistry , catalysis , engineering
We successfully synthesized Mn‐doped CsPbBr 0.5 I 2.5 nanocrystals ( NC s) using a traditional hot injection method. The Mn‐doped CsPbBr 0.5 I 2.5 NC s have very good luminescence propertie. Unfortunately, they can only be dissolved in nonpolar solvents, and they suffer from the effect of air instability, thermal instability, and water instability. In this study, we used mesoporous SiO 2 and Al 2 O 3 coatings to improve the air stability and water stability of these nanocrystals, inhibit the loss of Mn 2+ . The prepared composite material not only maintains the excellent optical properties of the NC s, but also the most important is to significantly improve the stability of the NC s. Importantly, Mn‐doped CsPbBr 0.5 I 2.5 NC s can also be used as a red fluorescent material, with green CsPbBr 3 NC glass‐emitting white LED under the excitation of an InGaN blue chip.