F. Zaman, G. Rooh, N. Srisittipokakun, T. Ahmad, I. Khan, M. Shoaib, Ataullah, J. Rajagukguk, J. Kaewkhao
Gadolinium-based borate glasses doped with Dy 3+ ions were developed by melt quenching technique for white light generation. The title glasses were examined by XRD, optical absorption spectra and Photoluminescence spectra. From photoluminescence emission spectra, the higher intensity peak was observed at 575 nm ( 4 F 9/2 → 6 H 13/2 ) for present glass samples. The experimental decay rate (τ exp ) of 4 F 9/2 transition of Dy 3+ ions were found to be a decline in increasing of Dy 2 O 3 content. The Inokuti-Hirayama (IH) model is used to explain the non-exponential decay time by putting S = 6, which confirmed that the energy is transfer through cross-relaxation is of dipole–dipole nature among the Dy 2 O 3 . The values of color coordinates match with the range of white light of chromaticity (CIE) diagram. The color chromaticity coordinates (u, v) and color correlated temperature (CCT) values for present glasses were correlated with standards, which are closely related to the standard, therefore, the prepared glasses might be helpful for different photonic applications such as white LEDs. © 2018 Elsevier Masson SAS
Department of Physics, Abdul Wali Khan University, Mardan, 23200, Pakistan; Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand; Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, 20221, Indonesia
