Identification of Cu and Ag acceptors in CdTe |
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Authors: | J.P. Chamonal E. Molva J.L. Pautrat |
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Affiliation: | Centre D''Etudes Nucleaires De Grenoble Département de Recherche Fondamentale Section de Physique du Solide 85 X - 38041 Grenoble, Cedex, France |
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Abstract: | We report here on the identification of the two dominant acceptor levels in high purity p type CdTe, with Cu and Ag on Cd site. This identification is based on back doping experiments coupled with electrical measurements and photoluminescence studies. Cu and Ag can form easily complex centers when a supersaturation is achieved. The way of obtained good doping without complexation, is explained. The principal bound exciton lines are at 1,5896 eV (Cu) and at 1,5885 eV (Ag). The precise hole binding energies obtained from optical data are EA (Cu) = 146 meV and EA (Ag) = 108 meV. |
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