Infrared cathodoluminescence of AlN

Measurements were made of cathode-ray excited infrared luminescence band of AlN powder in the temperature range 110 K to 535 K. The form of the temperature-dependent luminescence band and the temperature dependence of the band half-width were used in the determination of the value of the Huang-Rhys factor (S 2) as well as of the frequency of phonons (441 cm^–1) interacting with electron transition. A discussion is presented of the possibility of interaction between an infrared luminescence centre and branch of natural transverse acoustic vibrations of the AlN lattice.Na Slovance 2, Praha 8, Czechoslovakia.The author is indebted to Dr. J. Pastrák for valuable advice and suggestions concerning the measurement as well as the evaluation. Thanks are also due to Mr. J. Hejduk and Mr. J. Veselý for the preparation of AlN powders, and to Dr. V. Kohl for the setting-up of the programme and the computer calculations.