期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 14, 页码 6869-6877出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm15480c
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资金
- Thailand Research Fund [RMU5080052]
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Ubon Ratchathani University
- Office of the Higher Education Commission, Thailand
New bifunctional materials namely BTTF, TPTF and BPTF having 9,9-bis(4-diphenylaminophenyl) fluorene as a molecular platform were synthesized and characterized. These molecules showed strong blue emission in both solution and solid state with a solution fluorescence quantum efficiency of up to 74% and were thermally stable amorphous materials with glass transition temperature well above 170 degrees C. The abilities of these materials as blue light-emitting materials for blue OLEDs and hole-transporting materials for green OLEDs in terms of device performance and thermal property were superior to a commonly used N,N'-diphenyl-N,N'-bis(1-naphthyl)-(1,1'-biphenyl)-4,4'-diamine (NPB). Efficient non-doped blue and Alq3-based green OLEDs with maximum luminance efficiencies and CIE coordinates of 2.06 cd A(-1) and (0.15, 0.13), and 4.94 cd A(-1) and (0.29, 0.52) were achieved, respectively, with BPTF having two pyrene substituents as the emitting layer and the hole-transporting layer, respectively.
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