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 2024-01-20T17:31:00Z 2024-01-20T17:31:00Z 2021-09-02 2011-03-20 0253-2964 https://pubs.kist.re.kr/handle/201004/130522 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/m(2). English WILEY-V C H VERLAG GMBH LIGHT-EMITTING-DIODES ELECTROPHOSPHORESCENT DEVICES ORGANIC ELECTROLUMINESCENT IRIDIUM COMPLEXES EFFICIENCY FLUORENE FLUORESCENCE TRANSPORT MOLECULE HYBRID New Bipolar Green Host Materials Containing Benzimidazole-Carbazole Moiety in Phosphorescent OLEDs Article 10.5012/bkcs.2011.32.3.841 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.32, no.3, pp.841 - 846 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 32 3 841 846 scie scopus kci ART001536799 000288832700015 2-s2.0-79953250080 Chemistry, Multidisciplinary Chemistry Article LIGHT-EMITTING-DIODES ELECTROPHOSPHORESCENT DEVICES ORGANIC ELECTROLUMINESCENT IRIDIUM COMPLEXES EFFICIENCY FLUORENE FLUORESCENCE TRANSPORT MOLECULE HYBRID Benzimidazole Carbazole Phosphorescent green host OLED