TY - JOUR
T1 - Origin of size distributions in ZnSe self-organized quantum dots grown on ZnS layers
AU - Tawara, Takehiko
AU - Tanaka, Satoru
AU - Kumano, Hidekazu
AU - Suemune, Ikuo
N1 - Funding Information:
The authors are grateful to Professor S. Muto of Hokkaido University for his valuable discussions on the scaling theory. They also wish to thank Mitsuo Hoshiyama, Tatsuji Meike, Yasushi Hirata, and Keiji Hasegawa of Research Institute for Electronic Science, Hokkaido University, Equipment Developing Group for the development of MOVPE system. This work was supported in part by the Grant-in Aid for the Scientific Research by the Japanese Ministry of Education, Culture, Sports and Science, No. 9450119 and 10127203.
PY - 2000/5
Y1 - 2000/5
N2 - Main factors which determine the size, the standard deviations which show the degree of the size fluctuations for the average dot height and diameter, and density in ZnSe self-organized quantum dots (QDs) grown on ZnS layers were studied. By lowering the growth temperature the QDs average size and its standard deviation decreased and the density increased due to the slower surface migration. With the application of the scaling theory, it was revealed that the normalized size distributions were uniquely determined by the nucleation process although the apparent standard deviations of the QD sizes were dependent on the growth temperature. The influence of surface roughness of the underneath layer on the formation of the relations of the dot height and diameter was also examined. It was shown that the fluctuation of the surface potential contributes significantly to the apparent standard deviations of ZnSe self-organized QDs sizes.
AB - Main factors which determine the size, the standard deviations which show the degree of the size fluctuations for the average dot height and diameter, and density in ZnSe self-organized quantum dots (QDs) grown on ZnS layers were studied. By lowering the growth temperature the QDs average size and its standard deviation decreased and the density increased due to the slower surface migration. With the application of the scaling theory, it was revealed that the normalized size distributions were uniquely determined by the nucleation process although the apparent standard deviations of the QD sizes were dependent on the growth temperature. The influence of surface roughness of the underneath layer on the formation of the relations of the dot height and diameter was also examined. It was shown that the fluctuation of the surface potential contributes significantly to the apparent standard deviations of ZnSe self-organized QDs sizes.
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U2 - 10.1007/s11664-000-0037-0
DO - 10.1007/s11664-000-0037-0
M3 - Article
AN - SCOPUS:0033741117
SN - 0361-5235
VL - 29
SP - 515
EP - 519
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
IS - 5
ER -