Aluminium-related point defects in wurtzite-type ZnS
- 20 January 1985
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 18 (2) , 467-479
- https://doi.org/10.1088/0022-3719/18/2/023
Abstract
Infrared absorption (350-520 cm-1) due to localised vibrational modes has been studied in heavily Al-doped self-compensated ZnS crystals with the wurtzite structure. Measurements were made in polarised light on crystallographically oriented samples for three different configurations of the vectors k and E of the incident radiation and the c axis of the crystal. Using the polarisation selection rules, the following defects were identified in the absorption spectra obtained: (i) unassociated AlZn impurities with C3v symmetry; (ii) AlZn-VZn next-nearest-neighbour pairs oriented perpendicularly to the c axis of the crystal, with C1 symmetry; and (iii) AlZn-VZn next-nearest-neighbour pairs oriented at an acute angle to the c axis of the crystal, with Cs symmetry. It was found that below 600K most of the Al impurities form pairs with Zn vacancies.Keywords
This publication has 20 references indexed in Scilit:
- Infrared absorption and defects in Al-doped ZnSeJournal of Applied Physics, 1982
- Infrared absorption of Al-Li defect pairs in ZnSe and CdTeJournal of Physics C: Solid State Physics, 1981
- Infrared Studies of Defects in ZnS Crystals Double‐Doped with Li and Al, Ga, and InPhysica Status Solidi (b), 1981
- Luminescence Excitation Spectra and Their Exciton Structures of ZnS Phosphors. II. Al and Te Doped PhosphorsJapanese Journal of Applied Physics, 1980
- Infrared Studies of Al Complexes in Zinc SulphidePhysica Status Solidi (b), 1978
- Localized vibrational modes of Al paried with Cu, Ag, or Au in ZnSeJournal of Applied Physics, 1976
- Point defects, localized vibrational modes, and free-carrier absorption of Al-doped CdTeJournal of Applied Physics, 1976
- Growth of ZnS single crystals from the melt at 1850 °C under argon pressure of 50 atmJournal of Crystal Growth, 1967
- Localized Vibrational Modes of Lithium in Lithium-Diffused p-Type GaAsJournal of Applied Physics, 1967
- Optically Active Phonon Processes in CdS and ZnSPhysical Review B, 1964