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http://dx.doi.org/10.4191/kcers.2017.54.5.09

Structural and Optical Properties of Yellow-Emitting CaGd2ZrSc(AlO4)3:Ce3+ Phosphor for Solid-State Lighting  

Kim, Yoon Hwa (School of Materials Science and Engineering and Optolelectronics Convergence Research Center, Chonnam National University)
Kim, Bo Young (School of Materials Science and Engineering and Optolelectronics Convergence Research Center, Chonnam National University)
Viswanath, Noolu S.M. (School of Materials Science and Engineering and Optolelectronics Convergence Research Center, Chonnam National University)
Arunkumar, Paulraj (School of Materials Science and Engineering and Optolelectronics Convergence Research Center, Chonnam National University)
Im, Won Bin (School of Materials Science and Engineering and Optolelectronics Convergence Research Center, Chonnam National University)
Publication Information
Journal of the Korean Ceramic Society / v.54, no.5, 2017 , pp. 422-428 More about this Journal
Abstract
Single-phase yellow phosphor, $CaGd_{2-x}ZrSc(AlO_4)_3:xCe^{3+}$ ($CGZSA:Ce^{3+}$), possessing cubic symmetry with varied $Ce^{3+}$ concentrations, was synthesized using the solid-state reaction method. The samples were characterized using X-ray diffraction (XRD), excitation spectra, emission spectra, thermal quenching, and decay curves. The cubic phase of $CGZSA:Ce^{3+}$ phosphor was confirmed via XRD analysis. The photoluminescence spectra of $CGZSA:Ce^{3+}$ phosphor demonstrated that the phosphor could be excited at the wavelength of 440 nm; a broad yellow emission band was centered at 541 nm. These results indicate that the phosphors are adequately excited by blue light and have the potential to function as yellow-emitting phosphors for applications in white light-emitting diodes.
Keywords
Garnet structure; Yellow-emitting phosphor; White LEDs;
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