M2 河野朝哉君 (Mr. Tomoya Kawano) と笹部久宏准教授の低消費電力・長寿命有機ELを実現するテトラピリジン誘導体電子輸送材料に関する論文が英国化学会 (Royal Society of Chemistry) の J. Mater. Chem. C (IF: 8.067) に受理！河野、おめでとう！
本研究は、 JSPS 科研費（基盤研究B, 20H02807）、JST センター・オブ・イノベーションプログラム（COI）の助成を受けたものです。
Abstract: The electron transport layer (ETL) is one of the three primary layers for realizing low-power-consumption organic light-emitting devices (OLEDs). However, robust wide- energy-gap ETLs with high thermal and electrical stability have rarely been explored. In this study, we newly designed and developed a series of tetrapyridine/triphenyltriazine-conjugated ETLs, named TnPyTRZ derivatives (n = 2, 3, 4), to realize a low-power-consumption OLED with high operational stability. A green phosphorescent OLED based on T3PyTRZ simultaneously realized a low turn-on voltage (Von) at 1 cd/m2 of 2.18 V, a high external quantum efficiency of over 24%, a high power efficiency of over 115 lm/W, a long lifetime (LT50) of 30000 h at a high brightness of 1000 cd/m2. Even at 1000 cd/m2, the driving voltage was only 2.88 V. This performance is among the best reported to date.
