White light generation in Ce3+Tb3+Sm3+ codoped oxyfluoroborate glasses

• Published in: Journal of luminescence Vol. 154; pp. 334 - 338
• Main Authors: Hari Babu, B., Ravi Kanth Kumar, V.V.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2014; Elsevier
• Subjects: Color-coordinates: white light; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Energy transfer; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Oxyfluoroborate glasses: photoluminescence; Photoluminescence; Physics; Energy transfer; Color-coordinates: white light; Oxyfluoroborate glasses: photoluminescence; Lifetime; Color; Photoluminescence; Glass; Chromaticity; Cross relaxation; Codoping; Luminescence decay
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2014.05.010

Ce3+, Tb3+and Sm3+ oxyfluoroborate glasses were prepared and characterized using absorption, photoluminescence and time decay spectral analysis respectively. The decrease of emission peak intensity and lifetime values of Ce3+ ions are observed by introducing Tb3+ and Sm3+ into glass. This is due to an efficient energy transfer from Ce3+ to Tb3+, Sm3+; Tb3+ to Sm3+ and cross-relaxation channels. Further, the important characteristic parameters of white light emitting materials viz., energy transfer efficiency, chromaticity color coordinates, correlated color temperature and color purity are evaluated. •The energy transfer from Ce3+ to Tb3+; Sm3+ and Tb3+ to Sm3+ is studied.•CIE color coordinates fall in blue, green and white regions.•Ce3+Tb3+Sm3+ doped glasses exhibit white light emission under 312nm excitation.