[OLED2] OLED Material

[OLED2-2] Highly Efficient Deep Blue Fluorescence Emitter Based on Highly Conjugated Boron Structure

*Hanjong Yoo¹, Daehyun Ahn¹, Hyuna Lee¹, Juyoung Lee¹, Janghyuk Kwon¹ (1. Kyung Hee University (Korea))

Keywords:Boron TADF, blue TADF, Narrow FWHM

We synthesized and evaluated new deep blue fluorescence emitter, KH-FBD1. This emitter exhibits pure deep blue PL spectrum peak at 452 nm with 20 nm full width half maximum. Fabricated device shows high efficiency of 7.4% with deep blue color coordinate of (0.14, 0.07). In addition, this device indicates long operational lifetime (LT₉₅) of 100 hours at initial luminance 1,000 cd/m². It also shows high efficiency of 12.7% in high T₁ device with maintaining the deep blue color characteristic.