Phosphors having improved luminance and longer lifespan
AssigneeSamsung SDI Co., Ltd.
InventorsIl Yu, Sang-hyuk Lee, Young chul You, Kyu-chan Park
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Abstract
A phosphor having increased luminance and lifespan which includes a halide flux of the Group 1 element of the periodic table has a perovskite structure and satisfies the following formula: MTiO3: (A,B) where M is an alkaline earth metal, A is a rare earth element, and B is a Group 13 element of the periodic table. The halide flux-containing phosphor shows good luminance and lifespan characteristics compared to conventional phosphors without using sulfur and environmentally harmful cadmium in a host matrix. Therefore, the phosphor is advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).
Claims20
A phosphor with a perovskite structure comprising a halide flux of a Group 1 element of the periodic table and which satisfies the following relation:
- MTiO3:
- (A,B)
- where M is an alkaline earth metal, A is a rare earth element, and B is a Group 13 element of the periodic table and wherein the rare earth element is an element selected from the group consisting of cerium, praseodymium, europium, terbium, and thulium.
A phosphor with a perovskite structure comprising a halide flux of a Group 1 element of the periodic table and which satisfies the following relation:
- MTiO3:
- (A,B)
- where M is an alkaline earth metal, A is a rare earth element, and B is a Group 13 element of the periodic, wherein said halide flux of the Group 1 element is at least one element selected from the group consisting of Lil, Nal, Kl, LiCl, NaCl, KCl, LiBr, NaBr, and KBr.
A phosphor with a perovskite structure comprising a halide flux of a Group 1 element of the periodic table and which satisfies the following relation:
- MTiO3:
- (A,B)
- where M is an alkaline earth metal, A is a rare earth element, and B is a Group 13 element of the periodic table, wherein
- the alkaline earth metal is an element selected from the group consisting of magnesium, strontium, calcium, and barium, and
- the rare earth element is an element selected from the group consisting of cerium, praseodymium, europium, terbium, and thulium.
Dependencies are inferred from the claim text.