Investigation of New Red Phosphors of Eu3+ Activated (Gd, Lu) 3Al5O12 Garnet
Jinkai Li 1, Ji-Guang Li 1,2, and Yoshio Sakka 2
1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang, Liaoning, China
2. Advanced Materials Processing Unit, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki, Japan
2. Advanced Materials Processing Unit, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki, Japan
Abstract—The metastable garnet lattice of Gd3Al5O12 (GdAG) has been effectively stabilized by doping smaller Lu3+, which then allows an effective incorporation of rare earth ions Eu3+ activators for opto-functionality explorations. Detailed characterizations of the products were achieved by combined means of FT-IR, DTA/TG, XRD, FE-SEM, BET, PL/PLE. The [(Gd0.5Lu0.5)1-xEux]3Al5O12 (LnAG, x=0.01-0.09) garnet solid-solutions with good dispersion and a fairly uniform particle morphology were obtained by calcining their precursors with a general formula of (NH4)xLn3Al5(OH)y(CO3)z·nH2O (Ln=Gd, Lu and Eu), synthesized via carbonate coprecipitation. The LnAG exhibit strong 591 nm emissions (the 5D0→7F1 magnetic dipole transitions of Eu3+) upon UV excitation into the charge transfer band (CTB) at ~238 nm with CIE chromaticity coordinates of x=0.62 and y=0.38 (orange red), and the quenching concentration of Eu3+ was found to be 5at% (x=0.05). Owing to the improved crystallization of LnAG at a higher temperature, luminescence emission intensity increases significantly, especially above 1300 oC. The Eu3+ doped (Gd,Lu)AG phosphors are expected to be a new type of photoluminescent and scintillation material.
Index Terms—gadolinium aluminate garnet, Eu3+ doping, photoluminescence, lattice structure stabilization
Cite: Jinkai Li , Ji-Guang Li, and Yoshio Sakka, "Investigation of New Red Phosphors of Eu3+ Activated (Gd, Lu) 3Al5O12 Garnet," International Journal of Materials Science and Engineering, Vol. 1, No. 1, pp. 15-19, June 2013. doi: 10.12720/ijmse.1.1.15-19
Index Terms—gadolinium aluminate garnet, Eu3+ doping, photoluminescence, lattice structure stabilization
Cite: Jinkai Li , Ji-Guang Li, and Yoshio Sakka, "Investigation of New Red Phosphors of Eu3+ Activated (Gd, Lu) 3Al5O12 Garnet," International Journal of Materials Science and Engineering, Vol. 1, No. 1, pp. 15-19, June 2013. doi: 10.12720/ijmse.1.1.15-19
General Information
ISSN: 2315-4527 (Print)
Abbreviated Title: Int. J. Mater. Sci. Eng.
Editor-in-Chief: Prof. Emeritus Dato' Dr. Muhammad Yahaya
DOI: 10.17706/ijmse
Abstracting/ Indexing: Ulrich's Periodicals Directory, Google Scholar, Crossref
E-mail: ijmse@iap.org
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