Excitation Density Effects in the Luminescence Yield and Kinetics of MAPbBr[sub.3] Single Crystals
The luminescent Z-scan technique with time resolution is applied to the study of the luminescence properties of CH[sub.3] NH[sub.3] PbBr[sub.3] single crystals representative of the family of hybrid organic–inorganic lead perovskites successfully applied recently in photovoltaics and currently inves...
Saved in:
Published in | Crystals (Basel) Vol. 13; no. 7 |
---|---|
Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
MDPI AG
01.07.2023
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The luminescent Z-scan technique with time resolution is applied to the study of the luminescence properties of CH[sub.3] NH[sub.3] PbBr[sub.3] single crystals representative of the family of hybrid organic–inorganic lead perovskites successfully applied recently in photovoltaics and currently investigated as potential nanosecond scintillators. The third harmonic of Ti-sapphire laser (λ = 266 nm) with a pulse duration of 26 fs and 1 kHz frequency was applied for the luminescence excitation creating the charge carriers with the estimated density from 10[sup.17] to 10[sup.21] cm[sup.−3] in the temperature range from 13 to 300 K. Temperature and excitation density dependence of the luminescence yield and kinetics is interpreted with the consideration of the temperature-dependent binding of electrons and holes into excitons, a saturation of defects responsible for the non-radiative relaxation channel competing with exciton creation; absorption saturation resulting in the increased penetration depth of the excitation radiation and hence the increased contribution of the re-absorption. |
---|---|
ISSN: | 2073-4352 2073-4352 |
DOI: | 10.3390/cryst13071142 |