49‐1: <i>Invited Paper:</i> Hyperfluorescence™: Groundbreaking Materials Advancement for Diverse Color‐Gamut Applications

Hyperfluorescence™ (HF), known as the most advanced OLED emitting technology, combines thermally activated delayed fluorescence (TADF) and fluorescence mechanisms enabling 100% internal quantum efficiency (IQE) and narrowband emission without using noble metals. By judicious materials selection, HF OLEDs can widely correspond to the application requirements of diverse color gamuts for the primary colors of green, red and blue. Among our RGB achievements in this report, it is noteworthy that green HF exhibited a narrow bottom‐emission bandwidth of 28 nm, leading to an outstanding estimated TE efficiency of 199 cd/A, while a significant LT 95 of 1, 500h was achieved for AdobeRGB chromaticity. Also, a deep‐blue HF OLED achieved an unprecedented blue index of 417 cd/A/CIE y at CIEy = 0.05 by using a sky‐blue TADF sensitizer, offering an expedited path for device lifespan improvement