Optical Properties of Self-organized PbS Quantum Dot Superlattices
YE Chang-Hui1, YAO Lian-Zeng1, MU Ji-Mei1, SHI Gang1, ZHANG Li-De2
1Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026
2Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
Optical Properties of Self-organized PbS Quantum Dot Superlattices
YE Chang-Hui1;YAO Lian-Zeng1;MU Ji-Mei1;SHI Gang1;ZHANG Li-De2
1Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026
2Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
Abstract： Self-organization of PbS into quantum dot superlattices has been demonstrated for the first time, and hexaplanar colloidal crystals 1-10μm in size made from PbS quantum dots 3-6 nm in diameter are revealed in transmission electron microscope micrographs, and the inner structures of the superlattices can be seen by a high resolution transmission electron microscopy The optical absorption and photoluminescence spectra have been recorded. The ordering of the superlattices is crucial for the understanding of the fundamental properties of quantum-dot arrays, as well as for their optimal utilization in optical and electronic applications.
2000, Vol. 17 
