1334036-93-9Relevant academic research and scientific papers
New bipolar green host materials containing benzimidazole-carbazole moiety in phosphorescent OLEDs
Park, Jung Hwan,Kim, Eun Kyung,El-Deeb, Ibrahim M.,Jung, Su Jin,Choi, Dae Hyuk,Kim, Dong-Ha,Yoo, Kyung Ho,Kwon, Jang Hyuk,Lee, So Ha
, p. 841 - 846 (2011)
New green host materials, 9-phenyl-3-(4-(1-phenyl-1H-benzo[d] imidazol-2-yl)phenyl)-9H-carbazole (3a) and 9-(naphthyl-2-yl)-3-(4-(1-phenyl-1H- benzo[d]imidazol-2-yl)phenyl)-9H-carbazole (3b), have been designed and synthesized by attaching the electron transporting benzimidazole moiety to the hole transporting carbazole unit. These compounds have similar HOMO, LUMO levels and band-gap characteristics compared with CBP (4,4'-di(N-carbazolyl)biphenyl). The fabricated green phosphorescent OLED with this 3a host shows much better device performances compared to CBP-based one. The current and power efficiency is enhanced at least by 60 percent at a given constant luminance of 1000 cd/m2. Copyright
