NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2013, 4 (6), P. 816–822
ELECTRICAL PROPERTIES OF HOT WALL DEPOSITED PbTe–SnTe THIN FILMS
V. A. Ivanov – State Scientific and Production Association «Scientific-Practical Materials Research Centre of the National Academy of Sciences of Belarus», P. Brovka Street 19, 220072 Minsk, Belarus, Tel.: +375 172 84 12 49, Fax: +375 172 84 08 88; vasil@physics.by
V. F. Gremenok – State Scientific and Production Association «Scientific-Practical Materials Research Centre of the National Academy of Sciences of Belarus», P. Brovka Street 19, 220072 Minsk, Belarus, Tel.: +375 172 84 12 49, Fax: +375 172 84 08 88
H. G. Seidi – State Scientific and Production Association «Scientific-Practical Materials Research Centre of the National Academy of Sciences of Belarus», P. Brovka Street 19, 220072 Minsk, Belarus, Tel.: +375 172 84 12 49, Fax: +375 172 84 08 88
S. P. Zimin – Yaroslavl State University, Sovetskaya Street 14, 150000 Yaroslavl, Russia, Tel.: +7 4852 797774, Fax: + 7 4852 797751; zimin@uniyar.ac.ru
E. S. Gorlachev – Yaroslavl State University, Sovetskaya Street 14, 150000 Yaroslavl, Russia, Tel.: +7 4852 797774, Fax: + 7 4852 797751
Polycrystalline Pb1-xSnxTe (0.0 ≤x ≤1.0) telluride alloys were synthesized by the direct fusion technique. Thin films of these materials were prepared by a hot wall deposition method on glass substrates at Tsub =230–330 °C and in a vacuum of about 10-5 Torr. The microstructure of the films was characterized by XRD, SEM, EDX and AES. The films showed a natural cubic structure. The thin films’ microstructure consisted of densely packed grains with dimensions of 50–300 nm and crystallite growth direction is perpendicular to substrate plane. The asgrown Pb1-xSnxTe films showed p-type conductivity. Thermoelectric measurements of the films showed high values for the room-temperature Seebeck coefficient ranging, from 20 to 400 μV·K-1, for SnTe to PbTe thin films, respectively. The conductivity of the films was in the range of 3·101–1·104 Ω-1·cm-1.
Keywords: hot wall deposition, electrical properties, thin films.
PACS 73.50.h