Thin phosphor films of Ca0.5R1-x(MoO4)2:xLn3+, M+ (R3+ = La, Y), (Ln3+ = Eu, Tb, Dy) (M+ = Li+, K+ and Na+) were deposited on quartz substrates by pulsed laser deposition (PLD) technique by ablation of a stoichiometric monocrystal target. The deposition was carried out using an Nd‐YAG laser (λ = 1064 nm) in an ultra‐high vacuum (UHV) with an oxygen back pressure of 300 mTorr at 600°C substrate temperatures. The laser‐ablated films are optically active, as verified by the photoluminescence (PL) spectra, and the films exhibit smooth Stark levels. The photoluminescence of the Ca0.5R1-x(MoO4)2:xLn3+, M+ phosphors properties reveals characteristic visible emissions. Further, the co‐doping of alkali metal chlorides MCl (M = Na, K, Li) into the Ca0.5R1-x(MoO4)2:xLn3+, M+ phosphor greatly improves the luminescence intensity, which can be explained by charge compensation effect. The fluorescence lifetime and photometric coordinates are discussed in detail.
Part of the book: Applications of Laser Ablation