Photoluminescence of PbS quantum dots embedded in glasses
โ Scribed by Chao Liu; Jong Heo; Xianghua Zhang; Jean-Luc Adam
- Book ID
- 116670737
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 547 KB
- Volume
- 354
- Category
- Article
- ISSN
- 0022-3093
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We report the effect of dual beam excitation on the photoluminescence (PL) from PbS quantum dots in polyvinyl alcohol by using two excitation lasers, namely Ar + (514.5 nm) and He-Ne laser (670 nm). Both sources of excitation gave similar PL spectra around 1.67 eV (related to shallow traps) and 1.1
PbSe and PbS quantum dots (QDs) embedded in the oxide glass matrixes (SiO 2 -Na 2 CO 3 -ZnO-Al 2 O 3 -PbO 2 -B 2 O 3 ) were synthesized by means of fusion method. Their optical properties have been studied both theoretically and experimentally. We found that the optical absorption is strongly depend