Luminescent Polymer Containing the Eu(III) Complex Having Fast Radiation Rate and High Emission Quantum Efficiency
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Abstract
Radiation rates and emission quantum yields of Eu(III) were modified using asymmetric deuterated Eu(III) complexes doped in poly(methyl methacrylate) (PMMA) deuterated tris-(hexafluoroacetylacetonato)europium(III) with phospine oxide in order to produce lowthreshold levels for laser transmission and amplifier emissions. Geometric structures of asymmetric Eu(III) complexes were determined by single-crystal X-ray diffraction and Judd−Ofelt analysis. Luminescent polymers were fabricated by incorporating Eu(III) complexes in a PMMA matrix. Luminescent PMMA containing Eu(hfa-D)3(DPFBPO)2 exhibited the highest quantum yield and fastest radiation rate (quantum yield = 78 ± 6%, radiation rate =1.2 × 103 s-1) of the PMMA matrixes. Emission quantum yields of Eu(hfa-D)3 (TPPO)2 in acetone-d6 were found to be >95%. This radiation rate is of the same order as values reported for Nd:YAG. Prepared luminescent polymers including Eu(hfa-D)3(TPPO−F)2 showed promising results for applications to novel organic Eu(III) devices, such as organic liquid lasers, plastic lasers, and optical fibers.
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