PECULIARITIES OF GROWTH AND ELECTROPHISICAL PROPERTIES

OF EPITAXIAL FILMS OF Pb1-xSnxSe:In

E. Yu. Salaev, I. R. Nuriyev, Ch. J. Jalilova, N. V. Faradjev

Institute of Photoelectronics of the Azerbaijan Academy of Sciences, Baku, Azerbaijan

Films of PbBi1-xSnxSe (x = 0,03 - 0,7) doped by In atoms have been grown on the substrated of BaF2 (111, 100) by a molecular beam condensation method. Peculiarities of growth and their electrophysical properties have been investigated. The data on structure of films were obtained by electronographic, X-ray diffractometric and electron—microscopic methods. Epitaxial films by the thickness about 1–1,5 m m were obtained at the substrate temperature equal (400–450) ± 0,5 0C. The magnitudes of half-width of swinging curve of the X-ray diffraction changed within limits of W1/2 = 100–200 . The concentration and mobility of the charge carriers were n = (2–5) 1016 cm-3 and m = (2–3) 104 cm2/V s, accordingly. Films had a mirror-smooth surface by planes of growth (111, 100) on various substrates. The temperature dependences of a Hall coefficient Rí of the Pb1-xSnxSe doped by indium (0,3–0.5 mass. %) with different concentration of the charge carries were investigated. In is shown that mobility determined from Hall and electroconductivity measurements in the impurity conductivity region changes on degree-low m ~ T -n , where n = 1,6–2,5.