| Autor: |
Fang, Shaofan, Wang, Ye, Li, Huixia, Fang, Feier, Jiang, Ke, Liu, Zexiang, Li, Henan, Shi, Yumeng |
| Zdroj: |
Journal of Materials Chemistry C; 4/14/2020, Vol. 8 Issue 14, p4895-4901, 7p |
| Abstrakt: |
Lead halide perovskites are emerging as important candidates for many photoelectric applications; however, the toxicity of the heavy metal Pb poses a barrier to such applications. Thus, intense research efforts have been directed to developing lead-free photoelectric materials. Here, we report on the synthesis and transformation of the cesium copper halides Cs3Cu2I5 and CsCu2I3. These Cu based halide compounds are synthesized through a rapid antisolvent crystallization process with the use of isopropanol. The Cs3Cu2I5 has blue emission at 445 nm with a full width at half maximum (FWHM) of ∼81.7 nm; CsCu2I3 has a yellow emission at 575 nm with a FWHM of ∼119.9 nm. Notably, these two compounds can be interconverted through mechanochemical reactions. Therefore, standard white light emission can be obtained from a mixture of these two halides at an appropriate ratio and a white light emitting diode device is fabricated. We report a convenient route for rapid synthesis and easy tuning of Commission Internationale de l'Eclairage chromaticity coordinates to achieve white light emission. These findings might promote the large-scale synthesis of lead-free all-inorganic compounds for future applications in optoelectronic devices. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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