Abstract
The relaxation kinetics of photoexcited conductance in pyrolitic CdS films, both pure and doped with alkaline metals, has a complex nonmonoexponential structure and is characterized by a set of activation energy values in the range from E a = 0.2 to 0.4 eV. In this case, the activation energy in such complicated and inhomogeneous systems measured experimentally is a complicated function depending on the time of sample photoexcitation and the time of photocurrent relaxation: E a = E a (t ex , t relax ). It is shown that at least four types of potential barriers of heights of 0.2, 0.28, 0.35, and 0.39 eV participate in the process of recombination of nonequilibrium photoexcited electrons and holes.
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Original Russian Text © T.L. Mayorova, V.G. Klyuev, M. Fam Thi Hay, 2012, published in Rossiiskie Nanotekhnologii, 2012, Vol. 7, Nos. 5–6.
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Mayorova, T.L., Klyuev, V.G. & Fam Thi Hay, M. Relaxation of photoexcited conductance in inhomogeneous pyrolitic CdS films. Nanotechnol Russia 7, 298–301 (2012). https://doi.org/10.1134/S1995078012030093
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DOI: https://doi.org/10.1134/S1995078012030093