Bright emission via energy transfer from Dy to Tb in Bi2Sio5 nanophosphor

The present article discusses the optical and structural properties of Tb and Dy co-doped Bi2SiO5 nanophosphors which were synthesized by Co-precipitation method. The synthesized sample contains plate-like morphology of uniform thickness similar to 200 nm. Prepared samples were found of average crystallite size similar to 20 nm, which yield bright yellow dominating white emission and green emission, in Dy: Bi2SiO5 and Tb: Bi2SiO5 nanophosphor, respectively under LW-light excitation. We have reported one-way efficient energy transfer from Dy to Tb ion, which facilitates precise colour tuning ability. The energy transfer phenomenon was well explored using, photoexcitation, photoluminescence and time-resolved luminescence techniques. (C) 2017 Elsevier B.V. All rights reserved.