Luminescence Change from Orange to Blue for Zero‐Dimensional Cs 2 InCl 5 (H 2 O) Metal Halides in Water and a New Post‐doping Method
| Autor: | Fengwan Guo, Nan Wang, Yu Zhang, Jing Feng, Chuang Yang, Xinxin Zhong, Juan Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Recrystallization (geology) Dopant 010405 organic chemistry Exciton Organic Chemistry Doping Analytical chemistry Quantum yield General Chemistry 010402 general chemistry 01 natural sciences Biochemistry 0104 chemical sciences chemistry.chemical_compound Metal halides chemistry Luminescence |
| Zdroj: | Chemistry – An Asian Journal. 16:1619-1625 |
| ISSN: | 1861-471X 1861-4728 |
| DOI: | 10.1002/asia.202100293 |
| Popis: | Zero-dimensional metal halides have attracted much attention due to their attractive photoelectric properties. Here, we propose a new strategy of synthesizing metal halides crystals by recrystallization in water. The as-synthesized Cs2 InCl5 (H2 O)-orange crystals are dissolved and recrystallized in water (Cs2 InCl5 (H2 O)-blue), with its photoluminescence (PL) changing from orange to blue, both of which are derived from self-trapping excitons (STEs). The time-resolved photoluminescence (TRPL) spectrum of Cs2 InCl5 (H2 O)-blue shows that it has an ultralong lifetime up to milliseconds (τ=52.98 ms), which is expected to be applied in biological sensors. The photoluminescence quantum yield (PLQY) increases from 2.25% to 11.61% in the self-assembly process. By using a post-doping method, the PL of crystals turns into red when we introduce Mn2+ as dopant while there is no obvious change upon using a traditional solvent-thermal method. Recrystallization in water and post-doping provide a new perspective for the synthesis and doping of metal halides. |
| Databáze: | OpenAIRE |
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