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Thermoelectric Power of Polycrystalline Sb 2 Te 3 Films
Author(s) -
Patel N. G.,
Patel P. G.
Publication year - 1993
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170280325
Subject(s) - seebeck coefficient , materials science , crystallite , thermoelectric effect , electrical resistivity and conductivity , substrate (aquarium) , condensed matter physics , grain size , evaporation , analytical chemistry (journal) , composite material , thermal conductivity , metallurgy , thermodynamics , chemistry , electrical engineering , oceanography , physics , chromatography , geology , engineering
Polycrystalline stochiometric films of Sb 2 Te 3 with different thickness were prepared on glass substrates by a flash evaporation technique at constant substrate temperature of 423 K. The thermoelectric power of these films was determined by measuring integrally the developed thermo — e.m.f. at different temperature differences between the hot and cold ends. The thermoelectric power of Sb 2 Te 3 films was determined as a function of the temperature and thickness of the films. It was found that the Fermi level becomes pinned at higher temperatures. The values of γ, E 0 , and A parameters were determined as functions of the thickness of the films. The dependence of the thermoelectric power on the reciprocal thickness of the films was explained on the basis of the grain size effect.