A comparison of the photoluminescent and electroluminescent spectra of Er3+in ZnSe

The authors present a comparison of the photoluminescent and electroluminescent spectra of Er 3+ doped ZnSe and establishes that the emission sites in each case are different in origin. Two types of rare earth sites have been observed in electroluminescence and six sites in photoluminescence. The defect structure of each site is discussed.