CaSiO3:Ce,Mn体系中Ce3+→Mn2+的能量传递研究

本文研究了CasiO₃:Ce,Mn体系中Ce³⁺和Mn²⁺的发光及Ce³⁺→Mn²⁺的能量传递特性.分别采用Forster-Dexter电多极相互作用理论和Inokuti-Hirayama能量传递理论,研究了该体系中Ce³⁺→Mn²⁺的高效无辐射能量传递情况.结果表明,Ce³⁺→Mn²⁺的高效能量传递是以电偶极—偶极相互作用为主的电偶极—偶极和偶极—四极相互作用的共同结果.

Ce3+→Mn2+ ENERGY TRANSFER CHARACTERIS-TICS IN CaSiO3:Ce,Mn

The luminescence properties of Ce3+-and Mn2+-coactivated CaSiO3 have been studied with excitation of both UV light and cathode-ray. In both cases,the red Mn2+ emission is greatly enhanced by Ce3+. The very efficient Ce3+→Mn2+ energy transfer has been investigated by analyzing the optical spactra of Ce3+ and Mn2+ as well as the decay characteristics of Ce3+ luminescence at different Mn2+ concentrations.The energy transfer mechanism has been explored by applying both Förster-Dexter multipolar interaction theory and Inokuti-Hirayama direct energy transfer theory. The results obtained from the two approaches are in very good agreament, which clearly expounds that the efficient energy transfer is the result of cooperative action of electric dipole-dipole and dipole-quadrupole interactions and mainly of the dipole-dipole interaction.