Journal
SOLID STATE COMMUNICATIONS
Volume 342, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2021.114587
Keywords
Irradiation dose; Cationic substitution; Spectral shift; Photoluminescence
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Funding
- Science Development Foundation under the President of the Republic of Azerbaijan-Grant [N. E.IF-BGM-3BRFTF-2 +/2017-15/01/1-M-04]
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The study shows that the PL intensity of samples significantly increases with increasing gamma irradiation dose and concentration of Eu2+ ions. Additionally, a blueshift in PL maxima is observed when Ga ions are partially substituted with Al ions, leading to efficient luminescence emission in the green-yellow region.
The effect of gamma-irradiation, concentration of Eu2+ ions, cationic substitution of components (Ga -> Al) on photoluminescence (PL) of Ca(AlxGa1-x)(2)S-4:Eu2+ solid solutions was studied. It is shown that the PL intensity of the samples increases in two times with increasing the gamma irradiation dose (D) in the range of 0-1000 krad, as well as the PL intensity increase three times with increasing the concentration of Eu2+ ions from 3% to 7%. There are observed 44 nm blueshift in PL maxima when partial substitutions of Ga ions with Al ions, which enables efficient luminescence emission in the green-yellow region of the optical spectrum. It has been determined that observed PL emission is due to the electronic transitions of Eu2+ ions from excited 4f(6)5d levels to the ground 4f(7) level.
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