Abstract
Ultra-high color rendering index (CRI) white organic light-emitting device (WOLED) was achieved by using a deep red phosphorescent dye Iridium(III)Bis[1-(3,5-dimethylphenyl)-7-methylisoquinoline] (acetylacetone). The WOLED exhibits high luminance of 2529cd/m2 and power efficiency of 7.86lm/W at 5V, and shows ultra-high general CRI and R9 of 96 and 91. The average of all 14 CRIs is up to 95 at 5V. Besides, the current efficiency roll-off of the WOLED is reduced due to the balance of carrier injection and transportation in emissive layers. The results indicated that the deep red emission is very important for an ultra-high CRI WOLED.
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