Synthesis and characterization of PbSe quantum dots in phosphate glass
作者:
A. Lipovskii,
E. Kolobkova,
V. Petrikov,
I. Kang,
A. Olkhovets,
T. Krauss,
M. Thomas,
J. Silcox,
F. Wise,
Q. Shen,
S. Kycia,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 23
页码: 3406-3408
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120349
出版商: AIP
数据来源: AIP
摘要:
The controlled synthesis of PbSe nanocrystal quantum dots with narrow size distributions was achieved through phase decomposition of the PbSe solid solution in a phosphate glass host. Structural characterization by electron microscopy and x-ray diffraction shows that the dots have mean diameters between 2 and 15 nm. The exciton Bohr radiusaB=46 nmin PbSe, so these quantum dots provide unusual and perhaps unique access to the regime of strong quantum confinement. The optical absorption spectra are compared to the predictions of a theoretical treatment of the electronic structure. The theory agrees well with experiment for dots larger than∼7 nm,but for smaller dots there is some deviation from the theoretical predictions. ©1997 American Institute of Physics.
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