Synthesis and electroluminescent properties of highly efficient anthracene derivatives with bulky side groups

Autor: Youngil Park, Bing Yang, Jun Yeob Lee, Hyoung-Juhn Kim, Jongwook Park, Yuguang Ma, Soo-Kang Kim
Rok vydání: 2009
Předmět:
Zdroj: Organic Electronics. 10:822-833
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2009.04.003
Popis: 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-(3′,5′-diphenylbiphenyl-4-yl)anthracen-9-yl)-N,N-diphenylaniline (TATa). MATa and TATa had a PL max at 463 nm in the blue region, and MADa had a PL max at 498 nm. MADa and MATa had T g values greater than 120 °C, and TATa had a T g of 139 °C. EL devices containing the synthesized compounds were fabricated in the configuration: ITO/4,4′,4′′-tris(N-(2-naphthyl)-N-phenyl-amino)-triphenylamine (2-TNATA) (60 nm)/N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine (NPB) (15 nm)/MADa or MATa or TATa or 9,10-di(2′-naphthyl)anthracene (MADN) (30 nm)/8-hydroxyquinoline aluminum (Alq 3 ) (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.
Databáze: OpenAIRE
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