[20a-145-1~12] 12.4 Organic light-emitting devices and organic transistors

△ [20a-145-10] Enhancement of stability and clarification of degradation mechanisms in TADF-OLEDs with triazine electron transport layers

〇(M1)Kenta Yamaguchi^1,2, Toshinori Matsushima^1,2, Chihaya Adachi^1,2 (1.OPERA, Kyushu Univ., 2.JST ERATO)

Keywords:operational stability, triazine derivatives

Internal quantum efficiency (IQE) reaches 100% in thermally-activated delayed fluorescence (TADF) system, but there is room for improvement about operational stability of TADF-OLED. Aiming to enhance the stability of TADF-OLED, we focused new triazine electron transport materials, NPT and TPT, for hole blocking layer (HBL). NPT-HBL showed much longer device lifetime than T2T-HBL, although TPT-HBL showed shorter device lifetime than T2T-HBL.