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US 9,493,702 B2Granted
Garnet-based phosphor doped with thorium and light emitting device using the same
AssigneeForce4 Corp.
InventorsHo Shin Yoon, Seung Hyok Park, Jun Cho, Hye Min Boo, Sung Kyoung Jung
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Abstract
Provided is a garnet-based phosphor doped with thorium and a light emitting device using the same. In particular, a garnet-based phosphor having superior light characteristics and heat stability by using thorium as an activator, when compared to a conventional garnet phosphor using cerium as an activator, and a light emitting device using the same as a light source are provided.
Claims13
A garnet-based phosphor doped with thorium as a main activator represented by Formula 1 below:
- (L1−x−yThxMy)3N5O12 [Formula 1]
- wherein 0<x<1, 0≦y<1, and x+y<1,
- L is at least one selected from the group consisting of Y, Gd, Lu, Sc, La, Bi, Ir and Sb,
- M is selected from the group consisting of Pr, Tb, Sm, Se, U, Li and Na,
- N is at least one selected from the group consisting of Al, Ga and In, and the phosphor does not contain cerium.
2 more elements
Dependencies are inferred from the claim text.