Phosphate phosphor, light emitting device, and detecting device
In the present disclosure embodiments, a phosphate phosphor including an activation center of trivalent chromium and a light emitting device are provided. The light emitting device includes a light source and the above mentioned phosphate phosphor, such that the phosphate phosphor is excited by the light source and emits a wide spectrum of the infrared light. The light emitting device with wide emission spectrum of the infrared light may be widely applied in detecting devices.
1. A phosphate phosphor, comprising:
an activation center of trivalent chromium, wherein the phosphate phosphor emits an infrared light after excitation from a light,
wherein the phosphate phosphor has a general formula Sr 9 Sc 1-x (PO 4 ) 7 :xCr 3+ , and 0<x≤1.
2. The phosphate phosphor of claim 1 , wherein a crystal structure of the phosphate phosphor is monoclinic.
3. The phosphate phosphor of claim 1 , wherein the light comprises an ultraviolet light, a blue light, or a red light.
4. The phosphate phosphor of claim 3 , wherein the infrared light has an emission wavelength between about 700 nm to 1100 nm.
5. The phosphate phosphor of claim 3 , wherein the infrared light has a peak with peak wavelength between about 780 nm to 950 nm and full width at half maximum between about 90 nm to 200 nm.
6. The phosphate phosphor of claim 1 , wherein the phosphate phosphor has an internal quantum efficiency in a range of about 65% to 100%.
7. A light emitting device, comprising:
the phosphate phosphor of claim 1 ; and
a light source configured to emit the light.
8. The light emitting device of claim 7 , wherein the light source comprises an ultraviolet light source configured to emit the light with wavelength between about 300 nm to 350 nm.
9. The light emitting device of claim 7 , wherein the light source comprises a blue light source configured to emit the light with wavelength between about 400 nm to 550 nm.
10. The light emitting device of claim 7 , wherein the light source comprises a red light source configured to emit the light with wavelength between about 600 nm to 780 nm.
11. The light emitting device of claim 7 , wherein the light source comprises a light emitting diode.
12. The light emitting device of claim 7 , wherein the infrared light has a wide emission spectrum with wavelength between about 700 nm to 1100 nm.
13. A detecting device, comprising:
a light emitting device, comprising:
the phosphate phosphor of claim 1 ; and
a light source configured to emit the light; and
a sensing device configured to receive the infrared light after external absorption or reflection.
14. The detecting device of claim 13 , wherein the light source comprises an ultraviolet light source, a blue light source, or a red light source.
15. The detecting device of claim 13 , wherein the infrared light emitted from the light emitting device has a wide emission spectrum with wavelength between about 700 nm to 1100 nm.