Features of the core–valence luminescence and electron energy band structure of A1−xCsxCaCl3 (A = K,Rb) crystals

• Published in: Journal of physics. Condensed matter Vol. 19; no. 47; pp. 476211 - 476211 (8)
• Main Authors: Chornodolskyy, Ya, Stryganyuk, G, Syrotyuk, S, Voloshinovskii, A, Rodnyi, P
• Format: Journal Article
• Language: English; Russian
• Published: Bristol IOP Publishing 28.11.2007; Institute of Physics
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/19/47/476211

From luminescence spectroscopy of CsCaCl3, Rb1-xCsxCaCl3 and K1-xCsxCaCl3 crystals, we have found evidence for intrinsic and impurity core-valence luminescence due to the radiative recombination of valence electrons with the holes of intrinsic or impurity 5p Cs+ core states. The structural similarity of core-valence luminescence spectra has been revealed for the A1-xCsxCaCl3 (A = K,Rb) crystals investigated. The electron energy structure of the CsCaCl3 crystal has been calculated using the pseudopotential approach taking into account the gradient corrections for the exchange-correlation energy. The calculated density of the electronic states of CsCaCl3 has been compared with corresponding parameters obtained from the analysis of core-valence luminescence spectra.