Synthesis and white light emission of Dy3+ ions doped hexagonal structure YAlO3 nanocrystalline

A series of hexagonal YAlO3 with various Dy3+ ions concentrations were synthesized via a facile sol–gel combustion method. The samples were characterized by XRD, TEM, FT-IR and PL measurements. Results show that the Dy3+-doped hexagonal YAlO3 can commendably output white light, which consists of the blue 487 nm (4F9/2→6H15/2) and the yellow 578 nm (4F9/2→6H13/2) emissions. The high intensity of hypersensitive forced electric dipole transition (4F9/2→6H13/2) is due to the serious destruction of crystal field symmetry surrounding Dy3+ ions.