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Reflectivity Spectra of CdTe Implanted at Room and Liquid Nitrogen Temperature

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Czarnecka-Such E., Kisiel A., Rodzik A., Gołacki Z.

Acta Physica Polonica A

1992

vol. 82

issue 5

781-784

The fundamental reflectivity spectra of monocrystalline CdTe, implanted with Ag ions at room temperature and with Er ions at liquid nitrogen temperature, are investigated in the 0.5-6.0 eV energy range. The analysis of the obtained spectra leads to the suggestion that temperature of implantation influences the obtained results much more decisively than values of other parameters. For the implantation carried out at 300 K no significant changes in reflectivity spectra are observed regardless of magnitude of the ion dose (up to 5 × 10^{15}/cm^{2}) and this fact, in our opinion, is due to the self-annealing effect. For samples implanted at temperature 77 K with comparable doses of ions, however, the characteristic changes of shape and intensity of reflection coefficient spectra appear. The manner of this changes gives evidence that temperature 77 K is low enough to make the radiation induced lattice defects stable (frozen-in) which are responsible for the observed behaviour of CdTe fundamental reflectivity spectra.

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1 Acta Physica Polonica A

1 1992

1 Czarnecka-Such E.

1 Gołacki Z.

1 Kisiel A.

1 Rodzik A.

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Reflectivity Spectra of CdTe Implanted at Room and Liquid Nitrogen Temperature