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Received April 27, 2005
Accepted February 2, 2006
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Spectral dependency of Eu2+-activated silicate phosphors on the composition for LED application
Department of Chemical Engineering, ChungAng University, Seoul 156-756, Korea
Korean Journal of Chemical Engineering, July 2006, 23(4), 669-671(3), 10.1007/BF02706812
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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.
References
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Starick W, Kempfert W, Limburg H, Tews W, Roth G, Tasch S, Pachler P, “Silicate phosphors and their performance in white LEDs,” Proceedings of phosphor global summit, March 19-21, Scottsdale, USA (2003)
Hong G, Yoo W, Yoo JS, Lee H, Rowland J, Holloway PH, “Control of spectral properties in silicate-based phosphors for LED applications,” Proceedings of JES 204th Meeting, Orlando, Florida (2003)
Narendran N, Gu Y, Freyssinier JP, Yu H, Deng LJ, Crystal Growth, 268, 449 (2004)
Poort SHM, Reijnhoudt HM, van der Kuip HOT, Blasse GJ, Alloy. and Compd., 241, 75 (1996)
See, Proceedings of phosphor global summit, (16 Mar 2004-18 Mar 2004 Miami, Florida, U.S.A.)
Starick W, Kempfert W, Limburg H, Tews W, Roth G, Tasch S, Pachler P, “Silicate phosphors and their performance in white LEDs,” Proceedings of phosphor global summit, March 19-21, Scottsdale, USA (2003)
