Research Article
Nature of Radiative Recombination Processes in Layered Heterogeneous PbCdI2 Thick Films: Promising Scintillator Materials
Figure 4
Temperature dependence of PL spectrum of PbCdI2 thick films (a). Fitting the separate bands that form PL spectrum of PbCdI2 thick films at āK. PL bands that correspond to the radiative recombination of bound and free excitons (E), recombination of donor-acceptor pairs involving shallow acceptor centers (D1 + D2), recombination of self-trapped excitons (STE), and recombination of free electrons and the deep acceptor centers (G1 and G3) are observed (b). Curves 1ā5 correspond to E, D1 + D2, STE, G1, and G3 bands, respectively. The red dashed curve represents the results of the fitting of the experimental data by the sum of Gaussian functions.
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