1. Absorption and photoluminescence of PbS QDs in glasses
- Author
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Liu, Chao, Kwon, Yong Kon, and Heo, Jong
- Subjects
- *
ABSORPTION spectra , *PHOTOLUMINESCENCE , *QUANTUM dots , *LEAD sulfide , *OPTICAL properties of semiconductors , *PRECIPITATION (Chemistry) , *TEMPERATURE effect , *EFFECT of radiation on semiconductors , *GLASS - Abstract
Abstract: Optical properties of PbS quantum dots (QDs) precipitated inside the oxide glass matrix were investigated. Photoluminescence (PL) from the PbS QDs showed peak wavelengths located at 1170–1680nm with widths of 150–550nm. Radii of QDs in glasses were 2.3–4.7nm depending upon the thermal treatment. Peak wavelengths of PL bands shifted as much as 70nm as the temperatures and excitation irradiances increased. Calculated effective local temperatures indicated that these shifts of PL spectra were associated with local heating induced by the temperatures and laser beam. [Copyright &y& Elsevier]
- Published
- 2009
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