Efficiency of Red, Green, and Blue Infrared-to-Visible Conversion Sources

Efficiencies of ∼1%, 0.1%, and 0.01% have been achieved, respectively, in the red, green, and blue with simple infrared-to-visible conversion sources. Saturation effects observed in the blue-emitting phosphor Y0.65Yb0.35Tm0.001F3 have been explained. The first and second cross-transfer coefficients for this Yb, Tm system have been determined to be 1.3×10−17 and 8.3×10−15 cm3 sec−1.