Photoluminescence of Ca(AlxGa1–x)2S4:Eu2+ compounds
- Authors: Tagiev B.G.1, Tagiev O.B.1,2, Asadov E.G.1
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Affiliations:
- Institute of Physics
- Baku Branch
- Issue: Vol 122, No 5 (2017)
- Pages: 757-763
- Section: Condensed-Matter Spectroscopy
- URL: https://journal-vniispk.ru/0030-400X/article/view/165391
- DOI: https://doi.org/10.1134/S0030400X17040191
- ID: 165391
Cite item
Abstract
Photoluminescence (PL) observed in solid solutions of Ca(AlxGa1–x)2S4:Eu2+ (x = 0.1–0.3) is studied. It is shown that the increase in emission intensity by 18% is caused by changes in the x values and electronic 5d → 4 f transitions in Eu2+ ions. A change in the position of the emission spectrum or its partial shift toward shorter wavelengths is due to an increase in the aluminum concentration and a decrease in the crystal field energy. The energy of the zero phonon line E0, redshift D, and the Stokes shift ΔS are determined. A decrease in the photoluminescence intensity maximum and an increase in the half-width of the spectrum are found in the temperature range of 10–300 K. The efficiency of emission at temperatures of 20 and 300 K is almost independent of the excitation power density of up to ~104 W/cm2. The luminescence lifetime of Eu2+ ions was 383, 357, 346, and 333 ns for x = 0, 0.1, 0.2, and 0.3, respectively.
About the authors
B. G. Tagiev
Institute of Physics
Author for correspondence.
Email: elsenesedov@gmail.com
Azerbaijan, Baku, AZ1143
O. B. Tagiev
Institute of Physics; Baku Branch
Email: elsenesedov@gmail.com
Azerbaijan, Baku, AZ1143; Baku, AZ1143
E. G. Asadov
Institute of Physics
Email: elsenesedov@gmail.com
Azerbaijan, Baku, AZ1143
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