We report on photoluminescence excitation spectroscopy performed on several (Zn, Cd)Se/ZnSe quantum wells at low temperature. Experimental results are compared with a calculation of the heavy- and light-hole excitonic transition energies. It is shown that the energy difference between the first heavy- and light-hole transitions and can be very sensitive to the valence-band offset under some circumstances, making a determination of this parameter then possible. The strain-free relative valence-band offset is found The heavy-hole excitons are type-I excitons, whereas the light-hole excitons are type-II excitons.
Study of the band alignment in (Zn, Cd)Se/ZnSe quantum wells by means of photoluminescence excitation spectroscopy
C. Guénaud, E. Deleporte, A. Filoramo, Ph. Lelong, C. Delalande, C. Morhain, E. Tournié, J. P. Faurie; Study of the band alignment in (Zn, Cd)Se/ZnSe quantum wells by means of photoluminescence excitation spectroscopy. J. Appl. Phys. 15 February 2000; 87 (4): 1863–1868. https://doi.org/10.1063/1.372105
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