Optical characterization of CdSe/Dy3+-doped silica matrices

Pramana

P R Rejikumar³  S Kartika²  N V Unnikrishnan1²  Thomas Vinoy¹  P V Jyothy² 

[1] Department of Physics, Christian College, Chengannur 689 122, India$$;School of Pure & Applied Physics, Mahatma Gandhi University, Kottayam 686 560, India$$;Department of Physics, T.K.M.M. College, Nangiarkulangara, Alapuzha 690 513, India$$

关键词: Sol–gel synthesis;    nanocrystallites;    fluorescence;    TEM.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Cadmium selenide nanocrystals along with dysprosium ions are doped in silica matrices through sol–gel route. The optical bandgap and size of the CdSe nanocrystals are calculated from the absorption spectrum. The size of the CdSe nanocrystallites is also evaluated from the TEM measurements. The fluorescence intensities are compared for SiO2–Dy3+ and CdSe-doped SiO2–Dy3+. The fluorescence intensity of Dy3+ is considerably increased in the presence of CdSe nanocrystals.

【 授权许可】

Unknown