Properties of excitonic photoluminescence from ZnCdSe/ZnSe quantum well structures

Abstract The photoluminescence spectra from ZnCdSe/ZnSe quantum well structures are investigated. Both free exciton and associated low-energy peaks are observed under the continuous wave excitation. Experimental results indicate that the low-energy peaks are due to the charged excitons. The binding energies are measured to be 4.0, 7.0, 10, and 12 meV for the Zn0.8Cd0.2Se quantum wells of width 10.0, 5.0, 3.8, and 2.5 nm, respectively.