This article is cited in 1 paper

Optical properties

Luminescent and photochemical processes in CdBr$_2$ : AgCl crystals

S. S. Novosad, I. S. Novosad, B. M. Kalivoshka

Ivan Franko National University of L'viv

Abstract: This paper reports on the results of the investigation into the optical luminescence properties of photochromic crystals CdBr$_2$ : AgCl grown by the Bridgman–Stockbarger method. It has been shown that, under X-ray, optical, and N$_2$-laser excitations of the grown crystals, there occurs emission due to Ag$^+$ impurities in addition to emission from centers characteristic of CdBr$_2$. The photostimulated chemical reactions occurring in CdBr$_2$ : AgCl lead to a weakening of the luminescence and to a change in its spectral composition. Models of photosensitive centers and centers of photochemical coloring have been proposed. The mechanisms of the photochromic effect have been considered. The nature of luminescent and trapping centers has been discussed.

Received: 12.01.2011

 English version: Physics of the Solid State, 2011, 53:8, 1626–1633

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