Eu2+,Mn2+在BaZnP2O7中的发光及Eu2+→Mn2+能量传递

采用高温固相法合成了BaZnP₂O₇:Eu²⁺,Mn²⁺荧光粉，并对其发光性质及Eu²⁺对Mn²⁺的能量传递机理进行了研究.Eu²⁺和Mn²⁺在380 nm和670nm的发射峰分别由Eu²⁺的5d—4f跃迁和Mn²⁺的⁴T₁(^{4关键词： 磷酸盐 2+}')" href="#">Eu²⁺ 2+')" href="#">Mn²⁺ 能量传递

Luminescence and energy transfer of Eu2+, Mn2+ in BaZnP2O7

The BaZnP₂O₇:Eu²⁺, Mn²⁺ phosphor was synthesized by high temperature solid state reaction. The luminescence properties and the energy transfer between Eu²⁺ and Mn²⁺ were investigated. The emission bands of Eu²⁺ and Mn²⁺ peaking at 380nm and 670nm were originated from 5d—4f transition of Eu²⁺ which partly substituted the Ba²⁺ sites and ⁴T₁(⁴G)—⁶A₁(⁶S) transition of Mn²⁺ occupying Zn²⁺ sites, respectively. The dependence of Eu²⁺ and Mn²⁺ luminescence properties on their concentration was investigated. With the increasing Mn²⁺ dopant content, the intensity of Eu²⁺ was observed to decrease, but the intensity of Mn²⁺ was simultaneously found to increase. It is suggested from this phenomenon that Mn²⁺ ion is sensitized by Eu²⁺ ion, in other words, there is an energy transfer from Eu²⁺ to Mn²⁺ in BaZnP₂O₇ host. According to the Dexter's energy transfer formula of multipolar interaction, we have demonstrated that the energy transfer between Eu²⁺ and Mn²⁺ is due to the electric dipole-quadripole interaction of the resonance transfer.