M2 常山恭暉君（Mr. Hisaki Tsuneyama）と笹部久宏准教授のフェナントロリン誘導体をエキサイプレックスホストとして用いた高効率・長寿命深赤色有機ELに関する論文が英国化学会 (RSC: Royal Society of Chemistry) の Journal of Materials Chemistry C (IF: 7.393) に受理されました！ 常山、おめでとう！
Title: Highly stable and efficient deep-red phosphorescent organic light-emitting devices using phenanthroline derivative as n-type exciplex host partnes
By Hisaki Tsuneyama, Hisahiro Sasabe*, Yu Saito, Taito Noda, Daiki Saito, Junji Kido*, J. Mater. Chem. C, 2022, accepted.
Abstract: Although deep-red illumination light sources with an emission peak wavelength over 660 nm are optimal for plant growing and health monitoring systems, the stability and efficiency of organic light-emitting diodes (OLEDs) is insufficient for practical applications. In this study, we developed a novel exciplex host system to realize highly stable and efficient deep-red OLEDs by utilizing nBPhen, a phenanthroline derivative, as the n-type exciplex host partner and combined (DPQ)2Ir(dpm), a deep-red iridium complex, and a-NPD, a conventional triarylamine derivative, as the p-type exciplex host partner. The proposed optimized device exhibits a lifetime that is 6.6 times longer when compared with the state-of-the-art deep-red OLEDs and maintains a high maximum external quantum efficiency of approximately 17% at a low operating voltage of 2.37 V; such performance is considered among the best in the scientific literatures.
