Effect of isomorphic atom substitution on the lattice parameters and the optical absorption edge of TlGaSe2-TlInSe2 mixed crystals

Date

2006-05-01

Author

Gasanly, N. M.

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The variation of lattice parameters of TlGaSe2-TlInSe2 mixed crystals with composition have been investigated by using of X-ray diffraction technique. For the mixed crystals studied, a structural phase transition (monoclinic to tetragonal) due to atom substitution is observed when the sum of the tetrahedral covalent radii of the Ga(In) and the Se atoms in Ga(In)Se-4 tetrahedra reaches a critical value of about 0.254 nm. From transmission and reflection measurements, the compositional dependence of the indirect energy band gap was revealed.

Subject Keywords

X-Ray Diffraction, Optical Absorption, Mixed Crystals

URI

https://hdl.handle.net/11511/63781

Collections

Department of Physics, Article