Color rendering improvement of the YAG:Ce3+ phosphors by co-doping with Gd3+ ions. Issue 2 (1st February 2016)

• Record Type: Journal Article
• Authors: Hong, Woo Tae; Lee, Joo Hyun; Son, Jung Woo; Lee, Zion; Park, Hwa Jin; Kim, Hyeong Su; Lee, Jin Seong; Yang, Hyun Kyoung
• Is Part Of: Ceramics international. Volume 42:Issue 2:Part A(2016)
• Page Start: 2204
• Page End: 2208
• Publication Date: 2016-02-01
• Subjects: YAG:Ce3+ -- Phosphors -- Gd3+ -- Co-doping -- Luminescence properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.10.010
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Y3 Al5 O12 :Ce 3+, Gd 3+ (YAG:Ce 3+, Gd 3+ ) phosphors were synthesized by a high-energy ball milling method. The X-ray diffraction (XRD) patterns showed their garnet structure, and several diffraction peaks shifted to lower angle side when co-doped with Gd 3+ ions. Field emission scanning electron microscopy images exhibited irregular spherical particles of about 2 μm size. The photoluminescence (PL) properties of the YAG:Ce 3+, Gd 3+ phosphors were studied as a function of the Gd 3+ ion concentration. The PL excitation (PLE) spectra exhibited the broad-band 4f–5d transition of Ce 3+ ions centered at 439 nm. The PL spectra showed the intense 5d–4f transition of the Ce 3+ ions with a band maximum at 542 nm, and this band maximum shifted to the longer wavelength region by increasing concentration of the Gd 3+ ion.