Low Temperature Physics: 30, 891 (2004); https://doi.org/10.1063/1.1820019 (6 pages)
Физика Низких Температур: Том 30, Выпуск 11 (Ноябрь 2004), c. 1187-1193    ( к оглавлению , назад )

Mechanisms of radiative and nonradiative recombination in ZnSe:Cr and ZnSe:Fe

M. Godlewski1,2, M. Surma1, V.Yu. Ivanov1, and T.P. Surkova3

1Institute of Physics of Polish Academy of Sciences, 32/46 Al. Lotnikow Str., Warsaw 02-668, Poland
E-mail: godlew@ifpan.edu.pl

2Department of Mathematics and Natural Sciences College of Science, Cardinal S. Wyszyсski University, Warsaw, Poland

3Institute of Metal Physics of Russian Academy of Sciences, Ural Division, Ekaterinburg, Russia

Received May 25, 2004

Аннотация

Possible applications of ZnSe:Cr in optoelectronics are discussed. It is shown that 2+ to 1+ photo-ionization of chromium results in efficient pumping of Cr2+ intrashell emission and in energy up-conversion from green to blue. A distinct difference in efficiency of the energy up-conversion is observed between chromium and iron doped ZnSe samples. This difference we relate to a very efficient Auger mechanism of photoluminescence quenching in Fe-doped samples. We further demonstrate an anticorrelation of intensity of mid-infrared Cr emission and up-converted blue emission of ZnSe.

PACS:
42.55.Px - Semiconductor lasers; laser diodes
71.55.Gs - II-VI semiconductors
78.55.Et - II-VI semiconductors