Ultrapure Blue Thermally Activated Delayed Fluorescence Molecules: Efficient HOMO–LUMO Separation by the Multiple Resonance Effect

• DOI: 10.1002/adma.201505491
• Publication Date: 2016-02-11T12:09:00Z
• Authors: Takuji Hatakeyama; Kazushi Shiren; Kiichi Nakajima; Shintaro Nomura; Soichiro Nakatsuka; Keisuke Kinoshita; Jingping Ni; Yohei Ono; Toshiaki Ikuta
• Keywords: HOMO/LUMO; Ultrapure water; Quantum yield; Quantum Efficiency; Blueshift

Ultrapure blue-fluorescent molecules based on thermally activated delayed fluorescence are developed. Organic light-emitting diode (OLED) devices employing the new emitters exhibit a deep blue emission at 467 nm with full-width half-maximum of 28 nm, CIE coordinates (0.12, 0.13), and an internal quantum efficiency ≈100%, which represent record-setting performance for OLED devices.