NIR broadband emitting phosphors for infrared spectroscopy
A luminescent material is disclosed with emission in the near infrared wavelength range, the luminescent material including Sc 1-x-y A y RE:Cr x , wherein MO=P 3 O 9 , BP 3 O 12 , SiP 3 O 12 ; A=Lu, In, Yb, Tm, Y, Ga, Al, where 0≤x≤0.75, 0≤y≤0.9. A wavelength converting structure including the luminescent phosphor is also disclosed.
1. A wavelength converting structure comprising an NIR phosphor material, the NIR phosphor material comprising Sc 1-x-y A y BO 3 :Cr x , where A=In, Yb, Tm, Ga, or a mixture thereof and where 0<x≤0.75, 0<y≤1.
2. The wavelength converting structure of claim 1 , wherein A=In.
3. The wavelength converting structure according to claim 1 , further comprising a second phosphor material, wherein the second phosphor material includes at least one of a green phosphor, a red phosphor, and an IR phosphor.
4. The wavelength converting structure of claim 1 , wherein x≤0.5 and y≤0.9.
5. The wavelength converting structure of claim 2 , wherein x≤0.5 and y≤0.9.
6. The wavelength converting structure of claim 1 , wherein the NIR phosphor material emits light having a peak wavelength in a range of 700 nm to 1100 nm.
7. A light emitting device comprising:
a light source emitting a first light; and
the wavelength converting structure of claim 1 disposed in a path of the first light, the NIR phosphor in the wavelength converting structure emitting a second light having a wavelength range of 700 nm to 1100 nm in response to absorbing first light.
8. The light emitting device of claim 7 , wherein the wavelength converting structure comprises a second phosphor material that includes at least one of a green phosphor, a red phosphor, and an IR phosphor.
9. A luminescent material comprising Sc 1-x-y Tm y BO 3 :Cr x , where 0<x≤0.75, 0<y≤1.
10. The luminescent material of claim 9 , wherein x≤0.5 and y≤0.9.
11. The luminescent material of claim 9 , wherein the luminescent material emits light having a peak wavelength in a range of 700 nm to 1100 nm.
12. A light emitting device comprising:
a light source emitting a first light; and
the luminescent material of claim 9 disposed in a path of the first light, the luminescent material emitting a second light having a wavelength range of 700 nm to 1100 nm in response to absorbing first light.
13. The light emitting device of claim 12 , wherein the light emitting device comprises a second phosphor material that includes at least one of a green phosphor, a red phosphor, and an IR phosphor.