Time dependence of the luminescence intensity in CdBr2: AgCl,PbBr2 crystals under N2-laser excitation at room temperature

Abstract

Results of optical-luminescence studies of polydoped photochromic CdBr2: AgCl,PbBr2 crystals are presented. It is shown that the luminescence decrease vs. time under N2-laser excitation in the range of A-band of Pb2+ absorption is due to photochemical reactions. The empirical model describing the decrease of the luminescence related to silver impurities due to photochemical processes is suggested. Model parameters (trapping cross-section — σ — and the amount of centres destroyed by irradiation — β) were determined using the comparative analysis of experimental and calculated luminescence decay curves.

Optical Absorption and Luminescence Spectra of the Ag-CdI2 Photosensitive Heterosystem

“…I, arb. units Time variations in the luminescence intensity of the heterostructures are described within the framework of the model in which it is considered that under the action of UV irradiation a part of the centers of glow disappears [13,14]:…”

Long-term evolution of luminescent properties in CdI2 crystals

“…Aging processes are known to affect the functionality of various devices such as functional elements based on ceramics [17][18][19], polymer hybrid structures [20] or scintillators [21]. It was shown [22][23][24] that nanostructures are formed on the surface of CdI 2 crystals in the process of their aging in air.…”