Homogeneous Precipitation Synthesis and Low-Voltage Cathodoluminescence of SnO_2:Eu~(3+) Phosphors for Field Emission Displays

摘要

A reddish-orange-emitting SnO_2:Eu~(3+) phosphor for field emission displays (FEDs) was successfully synthesized via a homogeneous precipitation route using urea as a precipitant. The influences of the dopant concentration of Eu~(3+) and calcination temperature on optical properties were investigated. The low-voltage field emission properties of the FED device prepared using the synthesized SnO_2:Eu~(3+) phosphors were reported. Under the UV light, SnO_2:Eu~(3+) phosphors display the strong orange-red emission peaked at 587, 591, and 597 nm due to the ~5D_0→~7F_1 magnetic dipole transition of Eu~(3+). The phosphor doped with 1.0 mol% Eu~(3+) possesses the highest photoluminescent (PL) intensity. Under die low-voltage excitation of 300 V, the fabricated FED device exhibits the bright orange-red emission, high-voltage brightness saturation, and high color purity, which has a potential application in low-voltage full color FEDs.