Quantum dot formation of CdSe grown on ZnSe surfaces

摘要

Quantum dots (QDs) have much attraction to investigate optics in zero-dimensional (0D)-confined systems and many interests for optoelectronic devices because of their discrete density of state. II-VI semiconductors such as ZnSe, ZnS, and CdSe have wider band-gap and larger excition binding energies as compared to III-V semiconductors. Since excitons in II-VI semiconductors exist even at room temperature, there are some possibilities of new devices using their properties. CdSE/ZnSe system is expected to be naturally formed QD structures because of large lattice mismatch (about 7