Homogeneous Precipitation Synthesis and Low‐Voltage Cathodoluminescence of SnO ₂ :Eu ³⁺ Phosphors for Field Emission Displays

A reddish‐orange‐emitting SnO ₂ :Eu ³⁺ phosphor for field emission displays ( FED s) 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 ⁵ D ₀ → ⁷ F ₁ magnetic dipole transition of Eu ³⁺ . The phosphor doped with 1.0 mol% Eu ³⁺ possesses the highest photoluminescent ( PL ) intensity. Under the 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 FED s.