Solution-processed single-emissive-layer WOLEDs with high efficiency and ultra-high color rendering index beyond 90

We devised single-EML SP-WOLEDs with luminescent gold( iii ) emitters featuring high EQE max of 12.72%, CIE coordinates of (0.40, 0.40), and CRI of 93, which is among the best values for the single-EML SP-WOLEDs with CRI > 90 reported in the literature.