Yellow-green to yellow-emitting phosphors based on terbium-containing aluminates
AssigneeIntematix Corporation
InventorsJingtao Gu, Chengjun Duan, Yi-Qun Li
Life of this patent
Estimating the term…
Abstract
Yellow-green to yellow-emitting, lutetium aluminate-based terbium (Tb) containing phosphors for use in white LEDs, general lighting, and LED and backlighting displays are disclosed herein. The phosphor may further contain gadolinium (Gd). In one embodiment of the present invention, the phosphor comprises a cerium-activated, yellow-green to yellow-emitting lutetium aluminate-based phosphor having the formula (Lu1-xAx)3Al5O12:Ce wherein A is at least one of Gd and Tb and 0.1≦x≦1.0, wherein the phosphor is configured to emit light having a peak emission wavelength ranging from about 550 nm to about 565 nm, and wherein the phosphor contains at least some Tb.
Claims19
A cerium-activated, yellow-green to yellow-emitting lutetium aluminate-based phosphor having the formula (Lu1-xAx)3BzAl5O12Cw:Ce and wherein:
- A is at least one of Gd and Tb;
- B is at least one of Mg, Sr, Ca, and Ba;
- C is at least one of F, Cl, Br, and I;
- 0.001≦x≦1.0;
- 0<z≦0.5;
- and
- 2z>w≧2zp, wherein p is chosen from the group consisting of 0.50, 0.75, 0.90 and 0.95.
Dependencies are inferred from the claim text.