LOW-DIMENSIONAL II-VI SEMICONDUCTOR STRUCTURES - ZNSE MGS SUPERLATTICES AND CDSE SELF-ORGANIZED DOTS/

Low-dimensional II-VI wide-bandgap semiconductor structures are attrac tive both from basic physics related to excitons and applications to s hort-wavelength light emitters. In this paper, growth of zincblende Zn Se/MgS superlattices (SLs) is demonstrated and structural characteriza tion is performed. Enhanced excitonic properties in this new SL materi al will be discussed. Exciton localization due to heterointerface fluc tuations was observed at low temperature and the localization of excit ons showed high luminescence efficiency. The growth of a CdSe quantum dot structure, in order to realize the three-dimensional localization of excitons. was examined. Formation of self-organized CdSe dots was o bserved on (001)ZnSe surfaces. The long-term stability of the CdSe dot s is discussed.