Tailoring ultraviolet-green to white light via energy transfer from Tb3+ - Eu3+ codoped glasses for white light-emitting diodes. (October 2020)

• Record Type: Journal Article
• Authors: Vijayalakshmi, L.; Kumar, K. Naveen; Hwang, Pyung
• Is Part Of: Scripta materialia. Number 187(2020)
• Page Start: 97
• Page End: 102
• Publication Date: 2020-10
• Subjects: Tb3+/Eu3+ co-doped glasses -- Energy transfer -- CIE coordinates -- White light emission; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.06.014
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The photoluminescence properties of lithium borate glasses doped with Tb 3+ and Eu 3+ ions individually and together were explored. The combination of bright green and orange-red emissions from the optimized glasses can generate white light under ultraviolet excitation. The red emission of Eu 3+ ions was remarkably improved by external doping with Tb 3+ ions by means of energy transmission from Tb 3+ to Eu 3+ . The correlated color temperature and chromaticity coordinates were significantly changed from warm reddish to cool white region in Eu 3+ and (Tb 3+ +Eu 3+ ):lithium borate glassy matrices, respectively, which were found to be a good candidates for white light emitting device applications. Graphical abstract: Image, graphical abstract