Brytan V. The influence of atomic hydrogen doping on electric and optical properties of CdTe and Cd1-xZnxTe monocrystals grown by the sublimation method

Dissertation is devoted research influence of atomic hydrogen doping as well as annealing conditions on electric and optic properties of monocrystals of CdTe and CdZnTe grown by the in the hydrogen atmosphere sublimation method which allows to grow high-resistance and structurally homogeneous a long a bar CdTe and CdZnTe monocrystals. In this work complex research CdTe and CdxZn1-xTe crystals structure, electric and optic properties have been carried out. It is experimentally showed that after hydrogen atmosphere technological treatment of low-resistance Cd0,6Zn0,4Te (~10^5 Оmсm ; 300 К) samples takes place three order sharp its resistivity increasing. This resistivity increasing is due to passivation of fine electric active centers with activation energy ~ 0.05 eV - 0.2 eV. Electrostatic-deformation model of atomic hydrogen passivation compressing (stretching) type defects electric active centers in CdTe and CdxZn1-xTe semiconductors have been constructed. It is set that when the concentration of atomic hydrogen does not exceed the acceptors concentration there is strengthening of electric active centers passivation.