Spectral dependency of Eu2+-activated silicate phosphors on the composition for LED application |
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Authors: | Sang Hyeon Kim Hyo Jin Lee Kyeong Phil Kim Jae Soo Yoo |
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Affiliation: | (1) Department of Chemical Engineering, ChungAng University, 156-756 Seoul, Korea |
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Abstract: | An Sr2SiO4-Ba2SiO4 material system doped by Eu2+ was studied for light emitting diodes (LEDs) application. The main concern was the precise control of excitation and emission
spectra for maximum light yield and color coordinate, which was carried out by changing the composition of the alkaline earth
ions in host lattice. The Sr2SiO4 : Eu-Ba2SiO4 : Eu system was found to be excellent for white LED applications with excitation in the 380–465 nm region. Especially, the
yellow light intensity from (Sr,Ba)SiO4 : Eu phosphors was comparable to YAG : Ce phosphors in case of blue LED excitation. |
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Keywords: | White LED Phosphor Silicate Spectrum |
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