Abstract
Photoluminescence in modified CdTe/ZnTe superlattice multi-quantum wells (MQW's) was investigated. In order to reduce the number of misfit dislocations, the well region is formed from a short-period strained-layer superlattice composed of CdTe and ZnTe. The observed peak energies of the free exciton line are higher than those calculated. The full width at half-maximum of the observed line has a minimum around 45 K in the temperature range between 1.8 and 210 K. The broadening above 45 K is attributed to exciton scattering with phonons and ionized impurities, while the broadening below 45 K is due to localized states.
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