Effect of Confinement on Structural and Spectral Characteristics of Composites of CsPbX3 Halide Perovskite Nanoparticles with Zeolites of Faujasite Structure.

Autor: Posudievsky, O. Yu., Konoshchuk, N. V., Rozovik, O. P., Boiko, O. P., Sorokin, V. M., Koshechko, V. G., Pokhodenko, V. D.
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Zdroj: Theoretical & Experimental Chemistry; Sep2021, Vol. 57 Issue 4, p272-281, 10p
Abstrakt: CsPbBr3–zIz/Y(X) nanocomposites based on FAU (Y and X) zeolites and halide perovskite nanoparticles (HP NP) with CsPbBr3–zIz composition (z = 0 or 1.8) are prepared. The dependence of HP NP content on the SiO2:Al3O2 ratio in the parent zeolite and the formation of composite nanorods regardless of zeolite type in the case of iodine-containing HP due to the directional growth of CsPbBr1.2I1.8 crystals towards the (110) plane are shown. It is found that CsPbBr3–zIz/Y(X) materials are characterized by a significantly greater lifetime and intensity of photoluminescence in comparison with individual HP due to confinement effect. Highly stable films of CsPbBr3–zIz/Y(X)@Sil (z = 0 or 1.8) nanocomposites in silicone, which are characterized by a significant reduction of the luminescence band width, which is associated with the effect of silicone polymer on halide-ion exchange in HP, are prepared. It is shown that the color rendering index could be increased up to 95, while the partial index R9 could be increased up to 99 at correlated color temperature of ~4500 K when using CsPbBr1.2I1.8/X@Sil in white light emitting diodes. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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