Manganese doped upconversion luminescence nanoparticles
View Patent ↗The present relates in general to upconversion luminescence (“UCL”) materials and methods of making and using same and more particularly, but not meant to be limiting, to Mn 2+ doped semiconductor nanoparticles for use as UCL materials. The present invention also relates in general to upconversion luminescence including two-photon absorption upconversion, and potential applications using UCL materials, including light emitting diodes, upconversion lasers, infrared detectors, chemical sensors, temperature sensors and biological labels, all of which incorporate a UCL material.
1. An upconversion luminescence nanoparticle material having the general formula (X):(Mn, R), wherein
(X) is a host having a size less than 100 nm and is represented by the formula (M 1-z N z ) 1-x A 1-r B r where M=Zn, Cd, Pb, Ca, Ba, Sr, and Mg; N=Zn, Cd, Pb, Ca, Ba, Sr, and Mg; A=S, Se, Te, and O; B=S, Se, Te, and O; wherein 0<x<1, 0<r≦1, 0<z≦1, and
(R) is a rare earth ion.
2. The upconversion luminescence nanoparticle material of claim 1 , wherein the host is selected from the group consisting of Zn 1-x S r , Zn 1-x Se r , Zn 1-x Te r , Cd 1-x S r , Cd 1-x Se r , Cd 1-x Te r , Pb 1-x S r , Pb 1-x Se r , Pb 1-x Te r , Mg 1-x S r , Ca 1-x S r , Ba 1-x S r and Sr 1-x S r , wherein 0<x≦1, and 0<r≦1.
3. The upconversion luminescence nanoparticle material of claim 1 , wherein the nanoparticle host is Zn 0.4 Cd 0.4 S.
4. The upconversion luminescence nanoparticle material of claim 1 , wherein the nanoparticle host is Zn 0.9 S 0.8 Se 0.2 .
5. The upconversion luminescence nanoparticle material of claim 1 , wherein the rate earth ion is selected from the group consisting of Eu 3+ , Tb 3+ , Ce 3+ or Er 3+ .
6. An upconversion luminescence nanoparticle material selected from the group consisting of ZnS:Mn,Er; ZnSe:Mn,Er; MgS:Mn,Er; CaS:Mn,Er; ZnS:Mn,Yb; ZnSe:Mn,Yb; MgS:Mn,Yb; CaS:Mn,Yb and ZnS:Mn, Eu.
7. The upconversion luminescence nanoparticle material of claim 1 , wherein the upconversion luminescence nanoparticle material has an excitation wavelength that is longer than the emission wavelength.
8. The upconversion luminescence nanoparticle material of claim 7 , wherein the excitation wavelength is from 400 nm to 5000 nm and the emission wavelength is from about 200 nm to about 2000 nm.
9. A film comprising an upconversion luminescence nanoparticle material, wherein the upconversion luminescence nanoparticle material has the general formula (X):(Mn, R), wherein
(X) is a host having a size less than 100 nm and is represented by the formula (M 1-z N z ) 1-x A 1-r B r where M=Zn, Cd, Pb, Ca, Ba, Sr, and Mg; N=Zn, Cd, Pb, Ca, Ba, Sr, and Mg; A=S, Se, Te, and O; B=S, Se, Te, and O; wherein 0<x<1, 0<r≦1, 0<z≦1, and
(R) is at least one rare earth ion.
10. A solution comprising a nanoparticle material having the general formula (X):(Mn, R), wherein
(X) is a host having a size less than 100 nm and is represented by the formula (M 1-z N z ) 1-x A 1-r B r where M=Zn, Cd, Pb, Ca, Ba, Sr, and Mg; N=Zn, Cd, Pb, Ca, Ba, Sr, and Mg; A=S, Se, Te, and O; B=S, Se, Te, and O; wherein 0<x<1, 0<r≦1, 0<z≦1,
(R) is at least one rare earth ion.