Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 355, Issue 37-42, Pages 1880-1883Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2009.04.045
Keywords
Glasses; Laser-matter interactions; Measurement techniques; Atomic absorption; Optical spectroscopy; STEM/TEM; Nanoparticles, colloids and quantum structures; Nanocrystals; Quantum wells, wires and dots; Optical properties; Absorption; Luminescence; Oxide glasses; Borosilicates
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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 1170-1680 nm with widths of 150-550 nm. Radii of QDs in glasses were 2.3-4.7 nm depending upon the thermal treatment. Peak wavelengths of PL bands shifted as much as 70 nm 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. (C) 2009 Elsevier B.V. All rights reserved.
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