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

Abstract

A mechanistic framework for hot carrier cooling process in CsPbBr3 PNC is depicted via transient absorption spectroscopy.

Power Dependent Hot Carrier Cooling Dynamics in Trioctylphosphine Capped CsPbBr3 Perovskite Quantum Dots Using Ultrafast Spectroscopy

“…From these two main peaks, we can conclude that Pb depicts its more stable oxidation state as ‘‘+2’’ [59] . Formation of the Pb +2 oxidation state is the attribution of the X‐ray photon was absorbed on the surface of the material which indicates that there is possible coordination of Pb 2+ with octahedral structure PbBr 6 and making TOP‐PQDs more stable architecture [59] . Likewise, as rendered in Figure 4c, the core level peaks such as Br and its relevant binding energy 67.105 , similarly the peak Br and its corresponding binding energy is 68.123 , which confirms halide composition in the TOP‐PQDs as well presents [59] .…”

“…The high‐resolution spectrum of TOP‐PQDs suggests that a peak at binding energy 131.750 corroborates to the , similarly, another peak at binding energy 131.297 corroborates to and the last peak at binding energy 132.498 marked with an asterisk (*) sign may be due to impurity in the TOP‐PQDs system, and designating the presence of TOP onto the PQDs. Moreover, more details about the XPS spectra of the PQDs are given in our earlier reported work [59] . Figure 4 depicts the selected region in the full range spectrum as presented in Figure 3a, in name of the high‐resolution deconvoluted spectra of the Cs, Pb, Br, N, C, and O, for TOP‐PQDs [59] .…”

“…Moreover, more details about the XPS spectra of the PQDs are given in our earlier reported work [59] . Figure 4 depicts the selected region in the full range spectrum as presented in Figure 3a, in name of the high‐resolution deconvoluted spectra of the Cs, Pb, Br, N, C, and O, for TOP‐PQDs [59] . Figure 4a presents the peaks of core levels of the Cs, the binding energies for the corresponding peaks are 737.421 related to Cs and 723.435 corresponds to Cs , respectively [59] .…”

“…Figure 4 depicts the selected region in the full range spectrum as presented in Figure 3a, in name of the high‐resolution deconvoluted spectra of the Cs, Pb, Br, N, C, and O, for TOP‐PQDs [59] . Figure 4a presents the peaks of core levels of the Cs, the binding energies for the corresponding peaks are 737.421 related to Cs and 723.435 corresponds to Cs , respectively [59] . Figure 4b presents that the Pb features two deconvoluted core level peaks for instance, and corroborating binding energy is 142.162 and and its representing binding energy is 137.246 , respectively [59] .…”

“…Figure 4a presents the peaks of core levels of the Cs, the binding energies for the corresponding peaks are 737.421 related to Cs and 723.435 corresponds to Cs , respectively [59] . Figure 4b presents that the Pb features two deconvoluted core level peaks for instance, and corroborating binding energy is 142.162 and and its representing binding energy is 137.246 , respectively [59] . From these two main peaks, we can conclude that Pb depicts its more stable oxidation state as ‘‘+2’’ [59] .…”