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Proceedings Paper

White-light generation through Ce3+/Mn2+-codoped and Eu2+-doped Ba1.2Ca0.8-δSiO4 T-phase phosphors
Author(s): Kwang Won Park; Jae Bum Lee; Tae Hoon Kim; Jong Su Kim; Patrick Kung; Seongsin Margaret Kim
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Paper Abstract

Ce3+/Mn2+-codoped Ba1.20Ca0.8-2x-ySiO4:xCe3+, xLi+, yMn2+ phosphors show two emission bands peaking at around 600 nm (red) and 400 nm (deep-blue) from the forbidden 4T1-6A1 transition of Mn2+ ions and the allowed 4f-5d transition of Ce3+ ions, respectively. Eu2+-doped Ba1.20Ca0.7SiO4:0.1Eu2+ phosphor shows a broad green emission band from 430 to 550 nm from the allowed f-d transition in Eu2+ ions. The mixtures of both phosphors, excited by the near ultraviolet of 365 nm, show the various qualities of white lights depending on the mixture ratio; the correlated color temperatures from 3500 to 7000 K, and the color-rendering indices up to 95 %. Furthermore, they show a high quenching temperature of about 225 °C.

Paper Details

Date Published: 12 February 2010
PDF: 5 pages
Proc. SPIE 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV, 76171L (12 February 2010); doi: 10.1117/12.840520
Show Author Affiliations
Kwang Won Park, Pukyong National Univ. (Korea, Republic of)
Jae Bum Lee, Pukyong National Univ. (Korea, Republic of)
Tae Hoon Kim, Kyungpook National Univ. (Korea, Republic of)
Jong Su Kim, Pukyong National Univ. (Korea, Republic of)
The Univ. of Alabama (United States)
Patrick Kung, The Univ. of Alabama (United States)
Seongsin Margaret Kim, The Univ. of Alabama (United States)


Published in SPIE Proceedings Vol. 7617:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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