Spectroscopy characterization of MWCNT doped B2O3-Gd2O3-ZnO-Er2O3 glass for NIR solid state application
Eka Sylvianti Rahayu (a*), R. Rajaramakrishna (b), Mitra Djamal (a,c), Jakrapong Kaewkhao (b,d)
(a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132, Indonesia
*ekarukmanaeka[at]gmail.com
(b) Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand
(c) Physics Study Program, Department of Science, Insititut Teknologi Sumatera, Lampung, 35365, Indonesia
(d) Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabat University, Nakhon Pathom, 73000, Thailand
Abstract
In this work, multi wall carbon nanotube (MWCNT) doped borate glass has been successfully developed by melt quenching technique with the chemical composition 67.5B2O3-20ZnO-12Gd2O3-Er2O3-0.5MWCNT. Several peaks observed from absorption spectra due to transition from 4I15/2 as a ground state into several states i.e. 4G11/2, 4F7/2, 4F5/2, 2H11/2, 4F9/2, 4I11/2, and 4I13/2. The sample shows a strong emission in 1536 nm because of 4I13/2→4I15/2 transition under 524 nm wavelength excitation. Emission around 412 nm under 275 excitation could be the indication for presence of MWCNT. The sample exhibits NIR to NIR up-conversion under 1500 nm excitation. Absorption data have been used to calculate optical band gap energy through Tauc plot method. This study shows that MWCNT doped borate glass could be a promising material for solid state application in NIR region.
Keywords: borate glass, luminescence, MWCNT, erbium, NIR to NIR up-conversion, Tauc plot
Topic: Optical, luminescence, Electronic Materials and applications