Synthesis, structure and photoluminescence properties of Ca2YTaO6: Bi3+\Eu3+ double perovskite white light emitting phosphors

Novel tunable-color emitting phosphors with double perovskite structure un-doped, single and co-doped with Bi3+/Eu3+ ions were successfully synthesized by the high-temperature solid state reaction method. The crystal structure, band-gap, and electronic structure were investigated by using computational methods. The morphology and phase composition were obtained with scanning electron microscopy and powder x-ray diffraction. The un-doped Ca2YTaO6 phosphors shows an intensive intrinsic emission centered at 424 nm under 315 nm UV light excitation. The obtained intense blue emission (424 nm) was efficiently tuned to cyan, red and white light with doping of Bi3+ and Eu3+ as a result of energy transfer. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

Novel tunable-color emitting phosphors with double perovskite structure, synthesized via high-temperature solid state reaction, exhibit intensive intrinsic emission under UV light excitation, which can be efficiently tuned to different colors through doping Bi3+ and Eu3+.