Ba₃CaSi_1.7Al_0.3O₈: Eu, Mn white-emitting phosphor was prepared by solid reaction and X-ray powder diffraction (XRD) analysis confirmed the formation of Ba₃CaSi_1.7Al_0.3O₈: 0.1Eu, 0.1Mn. It was found experimentally that, its three-color emission peaks situated at 621, 491 and 435 nm respectively under excitation of 350-450nm irradiation. The 435nm and 491nm emission bands are attributed to 4f to 5d transition of Eu²⁺ ions. The emission band peaking at 621nm originates from the ⁴T₁-⁶A₁ transition of Mn²⁺ ions after the energy transferring from Eu²⁺ to Mn²⁺ ions. When the concentrations of the Al³⁺, Eu²⁺ and Mn²⁺ ions were 0.8 mol, 0.1mol and 0.1mol respectively, the sample presented intense white emitting. The addition of Al ion to the host leads to a substantial change of intensity ratio between blue to green emission.

Date Published: 19 February 2009
PDF: 6 pages
Proc. SPIE 7279, Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration, 727905 (19 February 2009);

Published in SPIE Proceedings Vol. 7279:
Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration
Liming Zhang; Michael J. O'Mahony, Editor(s)