Highly efficient phosphorescent organic light-emitting diodes based on novel bipolar iridium complexes with easily-tuned emission colors by adjusting fluorine substitution on phenylpyridine ligands

Two new phenylpyridine derivative-based heteroleptic iridium complexes, (Fppy) 2 Ir(dipg) (Fppdg) and (CF 3 ppy) 2 Ir(dipg) (tFmppdg) with emission peaks of 545 nm and 581 nm, respectively, were designed and synthesized by incorporation of a dipg group ( N , N ′-diisopro-guanidinate) as the ancillar...

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