Photoluminescence of High Quality ZnSe Single Crystals

Abstract

Results of our photoluminescence measurements on high quality ZnSe single crystals and doped crystals are described. Discussions are given to emissions related to free excitons, donor bound excitons and their excited states. The origin of D-A pair emissions related to doped Li and Na is clarified and Cu dope experiments reveal a possibility of site control of Cu from interstitial to substitutional sites. A emission of free excitons scattered by electrons is found in the twined crystals.