Abstract
In the present work we investigate the tunneling luminescence (TL) of Y2O3, Y2O3:Eu, and Sc2O3 ceramics. From an analysis of the decay kinetics of the TL it is established that the recombinational processes are described by a model involving recombination with a complex interaction. In addition, using the method of partial light sums, we show that in the ceramics investigated the mechanisms of TL are the same and the majority of radiation-induced defects in pairs are removed to distances exceeding the radius of effective tunneling transitions with a time constant of 10–100 sec. In the Y2O3:Eu ceramics the distances between defects decrease. TL occurs in pairs whose electron component is F-centers that are thermally released at 176 K in the Y2O3 ceramics and 200 K in the Sc2O3 ceramics. The hole components of tunneling pairs are associated with centers that are thermally released at 110 and 122 K in the Y2O3 ceramics and at 121 and 146 K in the Sc2O3 ceramics.
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I. Franko Lvov State University, 50, Dragomanov Str., Lvov, 290005, Ukraine. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 66, No. 5, pp. 649–651, September–October, 1999.
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Bordun, O.M., Bordun, I.M. & Lyskovich, A.B. Tunneling luminescence of Y2O3 and Sc2O3 ceramics. J Appl Spectrosc 66, 738–741 (1999). https://doi.org/10.1007/BF02675224
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DOI: https://doi.org/10.1007/BF02675224