Spectroscopy Study and Phonon Side Band Analysis in Europium Doped Borate Glass Eka Sylvianti Rahayu (a), Herman (a*), Lia Yuliantini (e) Nuanthip Wantana (c,d), R Rajaramakrishna (c,d), Nina Siti Aminah (a) Jakrapong Kaewkhao (c,d), Mitra Djamal (a,b)
a) Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung 46132, Indonesia
b) Physics Study Program, Department of Science, Sumatera Institute of Technology, Lampung 35365, Indonesia
c) Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand
d) Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000
(e) Research Centre for Electronics, National Research and Innovation Agency Republic of Indonesia (BRIN), Bandung 40135, Indonesia
Abstract
Glass widely known as a good host matrix for rare earth ions due to its high solubility and its optical properties. Among several glass former, borate has a highest phonon energy lies on the range of 1300 - 1500 cm-1 whereas high performance of several emitting device material requires low phonon energy. The phonon energy can reveal by phonon side band analysis from excitation spectra of Europium. In this work, a novel glass consists of B2O3doped Eu2O3 were prepared by melt-quenching technique. We measured the excitation spectra to analyze phonon side band and upconversion emission spectra to observe the effect of adding bismuth. IR spectroscopy was used to get the information about the environment of glass network. The strongest emission perform from Eu3+ doped glass has 614 nm wavelength by 394 nm excitation. Depend on quenching effect concentration analysis optimum concentration of Eu3+ is 3 mol%. The evaluated Judd-Ofelt parameters (Ω-λ-, λ-=2, 4, 6) has been used to calculate lasing parameters such as oscillator strength experiment (fexp) and calculation (fcal), transition probability (AR), branching ratio experiment (β-exp) and calculation (β-cal), and stimulated emission cross section (σ-).
