Temperature Dependence of Lattice Thermal Conductivity for some I-III-VI2 Group Compound Semiconductors


Mustafa S. Omer1, Hameed M. Ahmad2, & Suran M. Mamand2

College of Science, Salahaddin University,  College of Science, University of Sulaimani
Department. Of Physics, College of Sscience, Sulairuani University, Kurdistan Region lraq.





Abstract
Callaway formula is used to invesfigate the lattice thermal conductivity for nine compounds from the
ternary group I-III-VI2 semicanductors at the temperature range from 5 to 300K. The maximum
conductivities are found to be inthe tenrperature range 5-15K.The effects of the Debye temperature on
lattice thermal conductivity as weil as maximum conductivity are invesfigated in some details. Many
imperical formula are found to relate these compounds with their lattice thermal conductivities. The
effects of carrier impurities (N) on this type of conductivity for the compound CuInSe2 are investigated
and the N^ dependence is fcrund.

Key Words : Lattice thermal conductivity, ternary compounds , semiconductor . impurity effects.



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