NIR-OLED structures based on lanthanide coordination compounds: synthesis and luminescent properties
Source abstract
Abstract
Electroluminescence complexes based on ytterbium and 5-methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-2,4-dihydro-3H-pyrazol-3-one (HL) ligand and various diimine-type ancillary ligands (2,2-bipyridine, bathophenanthroline, 1,10-phenanthroline) have been synthesized, and corresponding crystals were investigated. [Yb(L)3(bipy)] and [Yb(L)3(bath)] complexes have triclinic structure (P-1), while [Yb(L)3(phen)] complex has orthorhombic structure (P212121). The crystallography parameters were determined. The photoluminescence of the complexes demonstrated only bands resulted from $$2 F5/2^{{}} o2 F7/2^{{}}$$ transition and corresponding three Stark subcomponents generated due to the crystal field action. NIR-OLED structures with emitting layers based on the [Yb(L)3(bipy)], [Yb(L)3(bath)], and [Yb(L)3(phen)] complexes have been fabricated, and their electroluminescence demonstrated maxima intensities at 978 and 1005 nm. Comparison of NIR-OLEDs power density showed that the maximal power densities of 2.17 (978 nm) and 1.92 (1005 nm) μW × cm−2 were determined for the NIR-OLED based on [Yb(L)3(bath)] complex.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Lanthanide and Transition Metal Complexes · Magnetism in coordination complexes · Organic Light-Emitting Diodes Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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