NIR and upconversion luminescence properties of Nd3+doped in Gd2O3-CaO-SiO2-B2O3 glass system

• Main Authors: S. Insiripong, S. Kaewjeang, U. Maghanemi, H. J. Kim, N. Chanthima, J. Kaewkhao
• Format: Book Series
• Published: 2018
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84901799213&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/45744
• Institution: Chiang Mai University

In this work, properties of Nd 3+ in Gd 2 O 3 -CaO-SiO 2 -B 2 O 3 glass systems with composition 25Gd 2 O 3 -10CaO-10SiO 2 -(55-x)B 2 O 3 -xNd 2 O 3 where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol% were investigated. The optical absorption spectra show peaks at 4 F 3/2 (877 nm), 4 F 5/2 + 2 H 9/2 (802 nm), 4 F 7/2 + 4 S 3/2 (743 nm), 4 F 9/2 (682 nm), 2 H 11/2 (627 nm), 2 G 7/2 + 4 G 5/2 (582 nm), 4 G 7/2 + 2 K 13/2 (527 nm), 4 G 11/2 (481 nm), 2 P 1/2 (427 nm) and 2 L 15/2 + 4 D 1/2 + 1 I1 1/2 + 4 D 5/2 + 4 D 3/2 (355 nm) reflecting the Nd 3+ ions in glass matrices. The densities were increased with increasing of Nd 2 O 3 concentration. This indicates the increase of the molecular weight by the replacement of B 2 O 3 with a heavier Nd 2 O 3 oxide in the glass. The upconversion luminescence spectra show bands at 393 nm for all Nd 2 O 3 concentration and the strongest intensity from 2.5% mol of Nd 2 O 3 was obtained. For NIR luminescence, the intensity of Nd 3+ emission spectra increases with increasing concentrations of Nd 3+ up to 1.5 mol% and beyond 1.5 mol% the concentration quenching is observed. © (2014) Trans Tech Publications, Switzerland.