Device Applications of the Ternary Semiconducting Compounds

Abstract

Rhumk. -Une revue retrospective gknkrale et quelques progres recents des dispositifs mettant en cruvre des composes ternaires 11-IV-V2 et I-111-V12 a structure chalcopyrite sont presentts.L'accent principal est mis sur les dispositifs optotlectroniques. Les sujets traites recouvrent les caracteristiques optiques et Clectroniques, les dispositifs optiques non lineaires melangeurs de frequences, les modulateurs Clectrooptiques, les lasers, les diodes electroluminescentes et les photodttecteurs.Abstract. -A review is presented of the general background and recent progress in device application of the ternary chalcopyrite 11-IV-V2 and I-111-V12 compounds. The main emphasis is on dcvices for optical and quantum electronics.

On the lattice dynamics of AgGaS2

“…It has eight AgGaS2 crystallizes in the chalcopyrite lattice [1] (space group is 12 atoms in the unit cell and therefore the phonon spectrum consists of 24 phonon branches. It has eight AgGaS2 crystallizes in the chalcopyrite lattice [1] (space group is 12 atoms in the unit cell and therefore the phonon spectrum consists of 24 phonon branches.…”

Electronic Structure, Optical, and Elastic Properties of AgGaS2 Crystal: Theoretical Study

“…The smallest band gap is E g = 1.036 and 0.940 eV for GGA and LDA functionals, respectively. The experimental value of the band gap presented in the literature is E g = 2.65 eV, [ 14 ] indicating that the band gap values for both, LDA and GGA methods are underestimated. Indeed, it is a known fact that the calculations using these functionals are characterized by an underestimation of the band gap, which is confirmed by our previous research as well as research of other authors.…”

“…[ 2 ] The grown single crystals are transparent and colored yellow. [ 13 ] The band gap determined from the absorption measurement is 2.6 еV [ 14 ] and transparency window is from 0.45 to 13 µm. [ 5 ] The crystal is found to be a promising material for intermediate band solar cells.…”

Lattice dynamics, thermodynamic and elastic properties of CdGeAs2

“…In our model the force constant matrix of the chalcopyrite crystal consists of three terms: (1) r .___ ~Coul _{_ ~Keat _~. ~R.…”