Horticulture lighting device
A lighting device is presented. The lighting device includes an LED light source; and a red/far-red emitting phosphor radiationally coupled to the LED light source, wherein the red/far-red emitting phosphor comprises a host material activated with an activator ion, and wherein the activator ion comprises at least one of Sm 2+ and Mn 2+ . Numerous other aspects are provided.
1. A lighting device, comprising:
an LED light source; and
a phosphor radiationally coupled to the LED light source, the phosphor for emitting red and far red light within a wavelength range from about 600 nm to about 800 nm, wherein the phosphor comprises a host material activated with an activator ion, and wherein the activator ion comprises at least one of Sm 2+ and Mn 2+ .
2. The lighting device of claim 1 , wherein the lighting device is a horticulture lighting device.
3. The lighting device of claim 1 , wherein the activator ion further comprises at least one of Mn 4+ , Eu 2+ , and Cr 3+ .
4. The lighting device of claim 3 , wherein the activator ion in the phosphor is Mn 4+ or Cr 3+ activated alumina.
5. The lighting device of claim 1 , wherein the host material is at least one of an oxide, a fluoride, an oxyfluoride, a nitride, an oxynitride, a sulfide, an oxysulfide, selenide, an oxyselenide, phosphates, borates, silicates, tungstates chlorides, bromides, oxyhalides, iodides, and a glass.
6. The lighting device of claim 1 , wherein the phosphor emits light in a wavelength range from about 650 nm to about 750 nm.
7. The lighting device of claim 1 , wherein the phosphor has peak emission at a wavelength in a range from about 650 nm to about 720 nm.
8. The lighting device of claim 1 , wherein the activator ion further comprises Eu 2+ and one or more of Mn 2+ and Cr 3+ .
9. The lighting device of claim 1 , wherein the activator ion further comprises Cr 3+ and Mn 4+ .
10. The lighting device of claim 1 , wherein the host material comprises a fluoride and the activator ion comprises Sm 2+ .
11. The lighting device of claim 10 , wherein the phosphor is Sm 2+ activated BaAlF 5 .
12. The lighting device of claim 1 , wherein the phosphor has a quantum efficiency greater than 70 percent.
13. The lighting device of claim 1 , further comprising an additional phosphor having a peak emission in a wavelength range from about 480 nanometers to about 650 nanometers.
14. The lighting device of claim 13 , wherein the additional phosphor comprises Ce 3+ activated garnets, Eu 2+ activated nitrides, Eu 2+ activated oxynitrides or a combination thereof.
15. The lighting device of claim 1 , wherein the LED light source emits light in a wavelength range from about 350 nm to about 500 nm.
16. A lighting device comprising:
an LED light source; and
a phosphor radiationally coupled to the LED light source, the phosphor for emitting red and far red light within a wavelength range from about 600 nm to about 800 nm, wherein the phosphor comprises a host material activated with Sm 2 +.
17. The lighting device of claim 16 , wherein the phosphor has peak emission at a wavelength in a range from about 650 nm to 720 nm.
18. The lighting device of claim 16 , wherein the lighting device is a horticulture lighting device.
19. The lighting device of claim 16 , wherein the LED light source emits in a wavelength range from about 350 nm to about 625 nm.