Zq. Zhu et al., CHARACTERIZATION OF ALLOY FORMATION AT THE ZNSE CDSE QUANTUM-WELL INTERFACE BY PHOTOLUMINESCENCE SPECTROSCOPY/, Journal of crystal growth, 138(1-4), 1994, pp. 619-624
The interface of a binary single quantum-well (SQW) structure of ZnSe/
CdSe, where CdSe of less than one monolayer is sandwiched between ZnSe
layers (submonolayer SQW), is characterized by photoluminescence spec
troscopy. The dependence of the energy, linewidth and intensity of exc
itonic emission from submonolayer SQWs on the well thickness of CdSe i
s extensively investigated. The characteristics of the excitonic emiss
ion are interpreted in terms of a heterostructure model in which 2 ML
wide alloyed wells are taken into account. It is shown that the ZnCdSe
alloy with layer thickness of about 2 ML forms at the interface in a
ZnSe/CdSe quantum well heterostructure.