Electronic energy relaxation and luminescence decay dynamics of Eu in Zn<sub>2</sub>SiO<sub>4</sub>:Eu phosphors期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Electronic energy relaxation and luminescence decay dynamics of Eu in Zn₂SiO₄:Eu phosphors

Authors:	Alan G. Joly Jun Zhang

Affiliation:	^a Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA ^b Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA ^c College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, China ^d Nomadics, Inc., 1024 South Innovation Way, Stillwater, OK 74074, USA

Abstract:	Electronic energy relaxation and decay dynamics of Eu³⁺ in Zn₂SiO₄:Eu³⁺ phosphors display evidence of intra-ion energy transfer from the ⁵D₁ to the ⁵D₀ manifold. The energy transfer timescale does not depend on Eu³⁺ concentration, or the addition of Mn²⁺ as a co-dopant and is estimated to be about 11 μs in Zn₂SiO₄. Evidence for intra-ion Eu³⁺ electronic energy transfer has also been observed in Eu-doped MgS as well as Eu³⁺ encapsulated in zeolite-Y. The energy transfer timescale in these other materials is shorter than in Zn₂SiO₄, most likely due to differences in Eu³⁺ surroundings or site symmetry.

Keywords:	Luminescence Energy transfer Relaxation dynamics Phosphors Intra-state Eu³⁺ Nanoparticles
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