| Autor: |
Gatto, Lorenzo, Treglia, Antonella, Crippa, Gabriele, Devetta, Michele, Folpini, Giulia, Petrozza, Annamaria, Stagira, Salvatore, Vozzi, Caterina, Cinquanta, Eugenio |
| Předmět: |
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| Zdroj: |
Journal of Optics; Oct2022, Vol. 24 Issue 10, p1-9, 9p |
| Abstrakt: |
The fine-tuning of the growth conditions and post-deposition treatments is of fundamental importance to improve the efficiency of photovoltaic devices based on all-inorganic metal halide perovskites like CsPbBr3. In this work, we used time-resolved terahertz spectroscopy (TRTS) in combination with optical characterization techniques, x-ray diffraction (XRD), and scanning electron microscopy, to probe the different properties induced by a low-temperature (180 °C) annealing treatment on evaporated CsPbBr3 thin-films. We observed a faster build-up and relaxation dynamics in the annealed sample, accompanied by a remarkable decrease of the photoluminescence intensity and minor changes in the photoconductivity and XRD measurements as compared to the as-deposited sample. We estimated for both the samples a mobility of ÎĽ = 1.7 ± 0.5 Ă— 10 2 cm2 Vâ'1 sâ'1. Our results suggest that the lattice reorganization induced by low-temperature annealing of evaporated CsPbBr3 could lead to a different charge carrier-phonon coupling and to an increased contribution of non-radiative recombination channels. We found that TRTS can be effectively used to follow the changes induced by post-deposition thermal annealing of CsPbBr3. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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