Blue to magenta tunable luminescence from LaGaO3: Bi3+, Cr3+ doped phosphors for field emission display applicationsElectronic supplementary information (ESI) available. See DOI: 10.1039/c7ra08864g

A series of blue to magenta emitting color-tunable LaGaO 3 : Bi 3+ /Cr 3+ phosphors were prepared by chemical routes, and their phase structure, morphology and photoluminescence (PL) properties were investigated in detail. Luminescence studies indicated that the optimum concentrations of Bi 3+ and Cr 3+ in LaGaO 3 were found to be 1 at% and 3 at%. Co-doping with Bi 3+ ions resulted in increased Cr 3+ emission intensity and gradual reduction in Bi 3+ emission intensity, confirming the presence of a Bi 3+ -Cr 3+ energy transfer. The energy transfer (ET) mechanism from the host lattice to the Bi 3+ and Cr 3+ ions in the LaGaO 3 : Bi 3+ /Cr 3+ phosphor has been explained. The ET efficiency has been calculated and found to be 55%. The critical ET distance has been calculated by the concentration-quenching method. The enhanced intensity and tuned luminous color of LaGaO 3 : Bi 3+ /Cr 3+ phosphors provided a promising material for field emission display devices. A series of blue to magenta emitting color-tunable LaGaO 3 : Bi 3+ /Cr 3+ phosphors were prepared by chemical route, and their phase structure, morphology and photoluminescence (PL) properties were investigated.