Radiation stability of luminescent materials
Radiační stabilita luminiscenčních nanomateriálů
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České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
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V této studii byla zkoumána radiační stabilita nanokrystalů CsPbBr3 s různou povrchovou modifikací v polymerové matrici a nanočástic perovskitů v toluenu. Vzorky byly ozařovány rentgenovým zářením a urychlenými elektrony. Radiační stabilita byla charakterizována měřením fotoluminiscenčních spekter. Jak pro ozařování rentgenem, tak elektrony byl pozorován pokles intenzity fotoluminiscence s ozařováním. Intezita fotoluminisce klesala pomaleji u kapalného vzorku. Kromě měření fotoluminiscence byla také měřana katodoluminiscenční spektra. V katoluminscenčních spektrech byl pozorován pokles signálu nejdříve matrice a pak teprve samotných perovskitů.
In this study, a radiation stability of CsPbBr3 nanocrystals with various surface modification in polystyrene matrix and perovskite nanocrystals in toluene were studied. Samples were irradiated by X-rays and accelerated electrons. The radiation stability was characterized by measuring of photoluminescence spectra. Both for X-rays irradiation and accelerated electrons, a decrease of the photoluminescence intensity was observed. Cathodoluminescvence spectra were also measured. In cathodoluminescence spectra, the decrease of the signal from the matrix was observed at the first and then the signal from perovskites decreased.
In this study, a radiation stability of CsPbBr3 nanocrystals with various surface modification in polystyrene matrix and perovskite nanocrystals in toluene were studied. Samples were irradiated by X-rays and accelerated electrons. The radiation stability was characterized by measuring of photoluminescence spectra. Both for X-rays irradiation and accelerated electrons, a decrease of the photoluminescence intensity was observed. Cathodoluminescvence spectra were also measured. In cathodoluminescence spectra, the decrease of the signal from the matrix was observed at the first and then the signal from perovskites decreased.