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The influence of Yb3+ co-doping on optical properties of Sm3+-doped sodium tellurite glasses

Nawaz, Fakhra and Sahar, Md. Rahim and Ghoshal, Sib Krishna (2014) The influence of Yb3+ co-doping on optical properties of Sm3+-doped sodium tellurite glasses. Advanced Materials Research, 895 . pp. 359-362. ISSN 1022-6680

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/AMR.8...

Abstract

A series of Sm3+-doped sodium tellurite glasses co-doped with Yb3+ were synthesized by melt quenching technique. The amorphous nature of the glasses was confirmed by X-Rays diffraction technique. From UV-Vis-NIR spectroscopy, eight absorption peaks of Sm3+ ions are observed. The broad absorption band in the range of ~870-1100 nm corresponds to the superposition of Sm3+: 6H5/2 6F11/2 and Yb3+: 2F7/2 2F5/2 transitions. The experimental and theoretical oscillator strengths of these bands were calculated by Judd-Ofelt theory. The optical band gap energy (Eopt) values for direct allowed transition and Urbach energy were found to be in the range of 2.73-2.91 eV and 0.21-0.27 eV respectively. Four luminescence emission bands 4G5/26H5/2, 6H7/2, 6H9/2 and 6H11/2 were revealed under 406 nm excitation and intensity of all bands is found to be quenched with addition of Yb3+ ions. The role of Yb3+ co-doping in the optical properties is compared and understood.

Item Type:Article
Uncontrolled Keywords:oscillator strength, tellurite glass
Subjects:Q Science
Divisions:Science
ID Code:62971
Deposited By: Fazli Masari
Deposited On:03 Oct 2017 14:54
Last Modified:03 Oct 2017 14:54

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