SELF-ORGANIZED GROWTH, RIPENING, AND OPTICAL-PROPERTIES OF WIDE-BANDGAP II-VI QUANTUM DOTS

We discuss the formation of self-assembling II-VI quantum dots during MBE growth, with emphasis on CdSe dots grown on ZnSe. AFM measurements on specimens with uncapped dots show relatively narrow dot size distr ibutions, with typical dot diameters of 35 +/- 5 nm. Uncapped CdSe dot s are unstable with time, showing clear evidence of ripening. Photolum inescence from capped dots indicates strong exciton localization, as e videnced by very intense PL emission even at relatively high temperatu res. (C) 1998 Elsevier Science B.V. All rights reserved.