期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 5, 期 2, 页码 309-313出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc04136a
关键词
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资金
- National Natural Science Foundation of China [21401148]
- National 1000-plan program
- Fundamental Research Funds for the Central Universities [xjj2013102, xjj2013043]
A rapid and facile gaseous anion-exchange reaction between CsPbBr3 perovskite nanocrystals and HCl vapor was carried out under the ambient conditions. The resultant CsPb( Br/Cl)(3) nanocrystals preserved the morphological features and crystal structure of the original CsPbBr3 nanocrystals and exhibited a significant blue-shift in the ultraviolet-visible light absorption and photoluminescence spectra. Inspired by the visual observations in the fluorimetry upon gaseous anion-exchange reaction, the CsPbBr3 nanocrystals were developed as highly sensitive and selective spectrochemical probes for the detection of toxic and corrosive HCl vapor with a concentration as low as 5 ppm.
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