Enhanced green upconversion luminescence properties of Er3+/Yb3+ co-doped strontium gadolinium silicate oxyapatite phosphor. Issue 12 (15th August 2018)

• Record Type: Journal Article
• Authors: Raju, G. Seeta Rama; Pavitra, E.; Bharat, L. Krishna; Rao, Gattupalli Manikya; Jeon, Tae-Joon; Huh, Yun Suk; Han, Young-Kyu
• Is Part Of: Ceramics international. Volume 44:Issue 12(2018)
• Page Start: 13852
• Page End: 13857
• Publication Date: 2018-08-15
• Subjects: Sol-gel process -- Submicron particle -- Upconversion luminescence -- Energy transfer -- Green emission; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.04.231
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Upconversion Sr2 (Gd.98- x Er.02 Yb x )8 Si6 O26 (SGSO:2Er 3+ / x Yb 3+ ) phosphor materials were synthesized using a citrate sol-gel process. X-ray diffraction patterns confirmed their hexagonal structure. Field emission scanning electron microscopy images of SGSO:2Er 3+ / x Yb 3+ phosphors depicted submicron particles. The enhanced upconversion luminescence properties of SGSO:2Er 3+ / x Yb 3+ phosphors were analysed as a function of Yb 3+ ion concentration and laser power. The energy transfer induced enhanced emission of the Er 3+ / Yb 3+ ions co-doped SGSO phosphors was ascribed to multi-phonon relaxation. The calculated chromaticity coordinates of the SGSO:2Er 3+ / x Yb 3+ phosphors showed emissions could be tuned by changing Yb 3+ ion concentration. Optimized sample exhibited the chromaticity coordinate values near to the ultra-high definition television standard green emission coordinates.