Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
ISSN: 0022-3697

hal-00808660
https://hal.univ-antilles.fr/hal-00808660

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
An empirical relation is proposed to analyze the broad band observed in the photoluminescence spectra of CuInSe2 (CIS) due to donor-acceptor pair recombinations. This permits, together with the knowledge of the majority carrier concentration and the compensation ratio, the determination of the activation energy ED of the donor and EA of the acceptor levels and the mean distance R between D-A pairs. Values of the dielectric constant ϵ, ED and EA for CIS obtained with this model agree with reported data.
ISSN: 0167-577X

hal-00808657
https://hal.univ-antilles.fr/hal-00808657
DOI : 10.1016/S0167-577X(96)00133-4

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
A new method to grow large single crystals with stoichiometry close to 1:1:2 of CuInSe2, an important member of the I-III-VI2 family of chalcopyrite semiconductors for optoelectronic device applications, is described. This is called the horizontal varying gradient zone freeze technique and consists of the selenization in the liquid phase of stoichiometric Cu and In and later solidification under programmed varying gradient in a fully automated multiple zone horizontal furnace. All ingots obtained with Se pressure between 15 and 1760 mm of Hg were single phase having chalcopyrite structure and p-type conductivity. X-ray, DTA, optical and electrical characterizations of the samples taken from different parts of the ingots were made. From energy dispersive spectroscopy it is found that the samples of the ingot obtained with Se pressure at 836 mm of Hg were much closer to the ideal stoichiometry 1:1:2.
ISSN: 0022-0248

hal-00808624
https://hal.univ-antilles.fr/hal-00808624
DOI : 10.1016/0022-0248(95)00346-0

Éditeur(s) : HAL CCSD
Résumé : International audience
The results of the Shubnikov-De Haas (SDH) oscillation measurements on CuInSe2-doped (CIS) crystals are presented for the first time. The measurements were performed in the temperature range from 1.9 to 40 K in pulsed magnetic fields up to 40 T. It was found that the Fermi surface of electrons consisted of one sphere. The values of the cyclotron effective mass at the bottom of the conduction band, the inter-band momentum matrix element and the g* factor were calculated.
Applied Physic Letters

hal-00808595
https://hal.univ-antilles.fr/hal-00808595
DOI : 10.1063/1.107741