Exciton formation and energy exchange with d-electron states in ZnSe/(Zn,Mn)Se multiple quantum wells

Hefetz, Y.; Goltsos, W. C.; Nurmikko, A. V.; Kolodziejski, L. A.; Gunshor, R. L.
February 1986
Applied Physics Letters;2/3/1986, Vol. 48 Issue 5, p372
Academic Journal
Time-resolved photoluminescence at low temperatures has been studied in ZnSe/(Zn,Mn)Se multiple quantum wells and (Zn,Mn)Se thin films, with emphasis on determination of the exciton formation rate and the energy transfer to the Mn-ion d-electron states, the latter contributing to the dominant yellow luminescence in (Zn,Mn)Se. In the quantum well samples which show efficient exciton (blue) emission, the capture of electron-hole pairs to the ZnSe layers on a picosecond timescale is sufficiently rapid to substantially reduce the yellow luminescence.


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