White OLEDs with an external quantum efficiency (EQE) of 2.8%, maximum brightness ( L ) of 1547 cd m ⁻² , current efficiency ( η c ) of 5.14 cd A ⁻¹ and power efficiency ( η p ) of 2.53 lm W ⁻¹ were fabricated using a newly developed Eu III -tetrakis-β-diketonate compound.
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Biju et al. (2015) studied this question.
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