Low Temperature Physics: 30, 891 (2004); https://doi.org/10.1063/1.1820019 (6 pages)
Fizika Nizkikh Temperatur: Volume 30, Number 11 (November 2004), p. 1187-1193    ( to contents , go back )

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
pos Анотація:

Received May 25, 2004

Abstract

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

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