Lattice Thermal Conductivity of Disordered Alloys of Ternary Compound Semiconductors Cu_2(Sn, Ge)(Se, S)_3 (Ag, Pb, Sb)Te_2, and (Ag, Sn, Sb)Te_2
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概要
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Lattice thermal conductivities of Cu_2SnSe_3-Cu_2SnS_3, Cu_2SnSe_3-Cu_2GeSe_3, Cu_2Sn_<0.8>Ge_<0.2>Se_3-Cu_2Sn_<0.8>Ge_<0.2>Se_3 and Cu_2Sn_<0.6>Ge_<0.4>Se_3-Cu_2Sn_<0.6>Ge_<0.4>Se_3 alloy systems have been determined as functions of the alloy compositions. Experimental results are compared with the Klemens-Drabble theory. Agreement between the theory and the experiment is good for Cu_2SnSe_3-Cu_2SnS_3 system, while the experimental values are appreciably below the theoretical curve for Cu_2SnSe_3-Cu_2GeSe_3 system. The discrepancy may be due to a contribution of strain to phonon scattering. In the case that both anionic sublattice and catonic sublattice are disordered as in alloy systems of Cu_2Sn_<0.8>Ge_<0.2>Se-Cu_2Sn<0.8>・parameter is given by the sum of the individual effects. Lattice thermal conductivities of AgSbTe_2-PbTe and -SnTe systems have been reinvestigated and compared with the theory. Qualitative agreement between the experimental data and the theoretical curves is obtained except for the PbTe-rich alloys in AgSbTe_2-PbTe system.
- 社団法人応用物理学会の論文
- 1966-10-15