1. Effect of Al2O3 on the formation of Se2− color centers and CdSe/Cd1−xZnxSe quantum dots in SiO2–Na2O–ZnO glasses.
- Author
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Xia, Mengling, Liu, Chao, Xu, Yinsheng, and Zhao, Xiujian
- Subjects
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ALUMINUM oxide , *QUANTUM dots , *SILICATES , *TRANSMISSION electron microscopy , *RAMAN spectroscopy - Abstract
Se2− color centers and CdSe/Cd1−xZnxSe quantum dots (QDs) were formed in silicate glasses, respectively, by carefully adjusting the content of Al2O3. The absorption coefficient and broad visible emission at 400‐700 nm of Se2− color centers increased firstly and then decreased upon increasing concentration of Al2O3 from 0 to 5 mol. %. With 2 mol. % Al2O3 adding, the band edge emission centered at 497 nm from CdSe QDs in glasses was observed after heat treatment. Raman spectra and TEM characterization confirmed the formation of CdSe/Cd1−xZnxSe QDs. The small amount addition of Al2O3 had a significant effect on the formation of Se2− color centers and precipitation of CdSe/Cd1−xZnxSe QDs in glasses due to its complicated effect on the network structure and optical basicity of the glasses. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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