Influence of the rate of radiation energy on the charge-carrier kinetics application of all-inorganic CsPbBr₃ perovskite nanocrystals.

ABSTRACT: In the field of optoelectronics, all-inorganic CsPbBr₃ perovskite nanocrystals (PNCs) have gained significant interest on account of their superb processability and ultra-high stability among all the counterparts. In this study, we conducted an in-depth analysis of CsPbBr₃ PNCs using joint transient optical spectroscopies (time-resolved photoluminescence and ultrafast transient absorption) in a very comprehensive manner. In order to understand the in-depth analysis of excited-state kinetics, the transient absorption spectroscopy has been performed. The structure of interest of CsPbBr₃ PNCs was subjected to the rates of the radiation energy of 0.10 mW (κ _r/κ _nr = ∼0.62) and 0.30 mW (κ _r/κ _nr = ∼0.64). With the rate of radiation energy 0.30 mW, it was observed that there was a significant increase in hot carrier relaxation together with high radiative recombination, resulting in a decrease in charge trappings. Herein, we demonstrate that the tuning of the rate of radiation energies helps to understand the charge-carrier kinetics of CsPbBr₃ PNCs, which would thus improve the manufacturing of efficient photovoltaic devices.

SUBMITTER: Kumar V 

PROVIDER: S-EPMC9056796 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature