Eu3+ ions co-doped CLPO: Dy3+ single phase white-light emitting phosphors for near UV-based white LEDs

Abstract CaLaP 3 O 10 : Dy 3+ /Eu 3+ phosphor powders were prepared by a facile sol–gel method. These samples were thermally treated at 900 °C for 6 h to get monazite type structure with monoclinic unit cell. The phase, morphology and optical properties of phosphor samples were characterized by X-ray diffraction patterns, Fourier transform infrared spectra, scanning/transmission electron microscope images, and photoluminescence excitation and emission spectra. The Dy 3+ /Eu 3+ ions co-doped samples showed warm white-light emissions with lower correlated color temperature values at higher Eu 3+ ion concentrations. The near-ultraviolet (NUV) excitation and the effective energy transfer form Dy 3+ to Eu 3+ ions can make these phosphors as potential candidates for NUV excitation based white light-emitting diodes.