Synthesis and electroluminescent properties of highly efficient anthracene derivatives with bulky side groups
- Synthesis and electroluminescent properties of highly efficient anthracene derivatives with bulky side groups
- 김수강; Bing Yang; 박영일; Yuguang Ma; 이준엽; 김형준; 박종욱
- OLED; Luminescence; Blue emission; Highly efficient; Bulky side group
- Issue Date
- Organic electronics
- VOL 10, NO 5, 822-833
- Three new asymmetric light emitting organic compounds were synthesized with diphenylamine
or triphenylamine side groups; 10-(3,5-diphenylphenyl)-N,N-diphenylanthracen-9-
amine (MADa), 4-(10-(3,5-diphenylphenyl)anthracen-9-yl)-N,N-diphenylaniline (MATa),
and 4-(10-(30,50-diphenylbiphenyl-4-yl)anthracen-9-yl)-N,N-diphenylaniline (TATa). MATa
and TATa had a PLmax at 463 nm in the blue region, and MADa had a PLmax at 498 nm. MADa
and MATa had Tg values greater than 120 C, and TATa had a Tg of 139 C. EL devices
containing the synthesized compounds were fabricated in the configuration: ITO/4,40,
400-tris(N-(2-naphthyl)-N-phenyl-amino)-triphenylamine (2-TNATA) (60 nm)/N,N0-
bis(naphthalen-1-yl)-N,N0-bis(phenyl)benzidine (NPB) (15 nm)/MADa or MATa or TATa
or 9,10-di(20-naphthyl)anthracene (MADN) (30 nm)/8-hydroxyquinoline aluminum (Alq3)
(30 nm)/LiF (1 nm)/Al (200 nm). The efficiency and color coordinate values (respectively)
were 10.3 cd/A and (0.199, 0.152; bluish-green) for the MADa device, 4.67 cd/A and
(0.151, 0.177) for the MATa device, and 6.07 cd/A and (0.149, 0.177) for the TATa device.
The TATa device had a high external quantum efficiency (EQE) of 6.19%, and its luminance
and power efficiencies and life-time were more than twice those of the MADN device.
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