Browsing by Author "Rusu, George G."

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    ABSORPTION SPECTRA AND EXTRINSIC PHOTOCONDUCTIVITY OF Cu AND Cd DOPED GaSe SINGLE – CRYSTAL FILMS
    (2006) Cuculescu, Elmira; Evtodiev, Igor; Caraman, Mihail; Rusu, George G.
    GaSe single crystal films were doped during growth process with Cu or Cd atoms with concentration ranged between 0.05 and 0.50 at. %. Single crystal films (with thickness about 0.5 μm) were obtained by mechanical splitting of bulk single crystals. Impurity concentration was determined using atomic emission spectroscopy. Spectral dependences of absorption coefficient and photoconductivity were studied in the range 1.50 eV – 3.70 eV. It was experimentally established that the absorption spectra have an additional absorption band and its corresponding energy depends on the nature (Cu or Cd) and concentration of the doping atoms. Also, independently on the presence of the dopant, other two absorption bands in the IR region are present.
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    ON THE PHOTOMAGNETIC EFFECT IN CdTe THIN FILMS EVAPORATED ONTO UNHEATED SUBSTRATES
    (2005) Rusu, George G.; Rusu, Mihaela; Caraman, Mihail
    Cadmium telluride (CdTe) thin films (d=500–700 nm) were deposited onto unheated glass substrates by thermal evaporation under vacuum. The dependence of the photomagnetic voltage on the magnetic induction for the as deposited and heat-treated films was investigated. The spectral dependence of the photomagnetic voltage was also investigated. The results are discussed in relation with structural characteristics of the studied films.