Mémoires de Fin d’Etudes
Etablissement
Université de Sidi Bel Abbès - Djillali Liabes
Affiliation
Département d’Electronique
Auteur
CHAREF, Nabila
Directeur de thèse
Dr. MAHDJOUB Zoubir (Maitre de conférence)
Filière
Electronique
Diplôme
Doctorat
Titre
Electronic and optical properties of ZnSnP2, ZnSnAs2 and AgGaTe2 chalcopyrite semiconductor
Mots clés
electronic, optical, properties, zincblende, crystal, structure, chalcopyrite, semiconductor, dielctric function.
Résumé
Recently much attention has been given to studies of electronic and optical properties of ternary compounds with chemical formula A N-1 BN+1 C8-N (N = 3,2). Theoretically, the study of the electronic and optical properties of these compounds is a logical extension of the study of their closest analogs, the B NC8-N (N= 3,2) zincblende semiconductors. The A N-1 BN+1 C8-N (N = 3,2) have many interesting physical properties which promise to be useful for studies of the electronic properties of semiconductors in general and for applications in semiconductor technology. In the case N = 3 most of these ternary compounds crystalize in the chalcopyrite structure which is a simple generalization of the zincblende crystal structure. We know from the work of Cohen and Bergstresser and Phillips and Van Vechten that most of the electronic and optical properties of thf BIII CV zincblende semiconductors are analogous to those of the diamond structure semiconductors (group BIV ). Some modifications exist when the effects of the anion and cation difference are introduced into the band structure and bonding properties. In the same way, most of the properties of A 2B 4C 5 chalcopyrite semiconductors can be understood by introducing the effects of the two cation differences into the band structure of their zincblende analog. In this work we will study the electronic and optical properties of this class of semiconductors using the dielctric function to calculate the optical constants and using one of band structure methods to calculate the electronic structure. Finally we compare our work to the experiment and other calculations.
Statut
Validé