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

• Single crystalline CLPO phosphors were successfully prepared by a sol–gel process.
• CLPO has monazite type structure with monoclinic unit cells.
• Eu3+ co-doped CLPO: Dy3+ samples give warm white-light emission with low CCT values.
• The NUV excitation (392 nm) allows the use of this material for WLED applications.

CaLaP3O10: Dy3+/Eu3+ 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 Dy3+/Eu3+ ions co-doped samples showed warm white-light emissions with lower correlated color temperature values at higher Eu3+ ion concentrations. The near-ultraviolet (NUV) excitation and the effective energy transfer form Dy3+ to Eu3+ ions can make these phosphors as potential candidates for NUV excitation based white light-emitting diodes.