FAN X W, SHAN Chong-xin, YANG Yi, ZHANG Ji-ying, SHEN De-zhen, LU You-ming, LIU Yi-chun. Growth and Characteristics of ZnCdSe and ZnSeS Quantum Dots under S-K and V-W Modes[J]. Chinese Journal of Luminescence, 2005,26(1): 9-14
FAN X W, SHAN Chong-xin, YANG Yi, ZHANG Ji-ying, SHEN De-zhen, LU You-ming, LIU Yi-chun. Growth and Characteristics of ZnCdSe and ZnSeS Quantum Dots under S-K and V-W Modes[J]. Chinese Journal of Luminescence, 2005,26(1): 9-14DOI:
CdSe self-assembled quantum dots (SAQDs) were grown on GaAs(100) by LP-MOCVD under Stranski-Krastanow(S-K) mode. Formation process of CdSe SAQDs below the critical thickness was observed by atomic force microscopy(AFM) images. It revealed that the formation of CdSe SAQDs below the critical thick was due to the effect of surface diffusion and strain release. ZnCdSe SAQDs were grown on GaAs(100) based on the calculated critical thickness by LP-MOCVD under S-K mode. Two kinds of variations in the QDs appeared over time
the Ostwald ripening process and formation process
which is interpreted by theory of crystal growth. ZnSeS QDs were grown on GaAs(100) by LP-MOCVD under V-W mode. With increasing the growth duration
the size of dots becomes larger and the density of the dots decreases
which is explained by virtue of surface free energy.