Abstract
Theac anddc electroluminescence in CaS:Cu, Sm have been investigated. The luminescence spectra show three peaks in the visible region. The brightness-voltage dependence satisfies the relationB=B 0 exp (−b/V 1/2) with two modes of variation. The nature of this dependence indc andac at different frequencies is discussed. The electroluminescence brightness also depends on the temperature of the phosphors and shows a peak around 80.0;C. The electroluminescence efficiency increases with applied voltage up to 2200 V and this dependence on V is explained on the basis of a transport process of the Schottky emission type.
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References
Alfrey G F and Taylor J B 1955Proc. Phys. Soc. London B68 775
Bhushan S 1983Indian J. Pure Appl. Phys. 21 370
Bhushan S and Chandra F S 1984aJ. Phys. D17 589
Bhushan S and Chandra F S 1984bCrystal Res. Technol. 19 715
Laud B B 1979Phys. Status Solidi a51 269
Lehmann W 1972J. Lumin. 5 87
Pankove J I 1977Electroluminescence (Berlin: Springer Verlag) p. 17
Patil M G, Pawar S H and Lawangar R D 1980Solid State Commun. 34 105
Rastogi A M and Mor S L 1978Indian J. Pure Appl. Phys. 16 779
Rastogi A M and Mor S L 1981Phys. Status Solidi a63 75
Vecht A, Waite M, Higton M H and Ellis R 1981J. Lumin. 24–25 917
Watchtel A 1960J. Electrochem. Soc. 107 199
Zalm P 1956Philips Res. Rep. 11 353, 417
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Bhushan, S., Chandra, F.S. ac anddc electroluminescence in CaS:Cu, Sm phosphors. Pramana - J Phys 24, 575–582 (1985). https://doi.org/10.1007/BF02846725
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DOI: https://doi.org/10.1007/BF02846725