title: The unusual electrochemical and photophysical behavior of 2,2'-bis(1,3,4-oxadiazol-2-yl)biphenyls, effective electron transport hosts for phosphorescent organic light emitting diodes.
abstract: The fluorescence and phosphorescence of 2,2'-bis(5-phenyl-1,3,4-oxadiazol-2-yl)biphenyl shows good spectral matching with the absorption spectra of the MLCT1 and MLCT3 transitions of Ir(ppy)3. The red-shift of the 0-0 band in the phosphorescence at 77 K is due to the intramolecular pi-pi interactions between the oxadiazole side chains. Maximum brightness of 43,000 cd/m2 with an efficiency of 26 cd/A at 200 cd/m2 was achieved when BOBP was used as the host material for Ir(ppy)3 in the PHOLED study. [structure: see text].
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei 106, Taiwan. mkleung@ntu.edu.tw
authors.forename: Man-kit
authors.initials: MK
authors.lastname: Leung
authors.forename: Chih-Chiang
authors.initials: CC
authors.lastname: Yang
authors.forename: Jiun-Haw
authors.initials: JH
authors.lastname: Lee
authors.forename: Hsin-Hung
authors.initials: HH
authors.lastname: Tsai
authors.forename: Chi-Feng
authors.initials: CF
authors.lastname: Lin
authors.forename: Chih-Yen
authors.initials: CY
authors.lastname: Huang
authors.forename: Yuhlong Oliver
authors.initials: YO
authors.lastname: Su
authors.forename: Chi-Feng
authors.initials: CF
authors.lastname: Chiu
mesh_terms: D001713:Biphenyl Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D004583:Electrons; D008029:Lighting; D049408:Luminescent Agents / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009930:Organic Chemicals / Q000737:chemistry*; D010069:Oxadiazoles / Q000138:chemical synthesis / Q000737:chemistry*; D010777:Photochemistry; D013237:Stereoisomerism
chemical_list: D001713:Biphenyl Compounds; D049408:Luminescent Agents; D009930:Organic Chemicals; D010069:Oxadiazoles