A carbazole-oxadiazole diad molecule for single-emitting-component white organic light-emitting devices (WOLEDs)

TETRAHEDRON

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Article

Wu, Xiaoming¹  Wang, Li¹  Hua, Yulin¹  Wang, Changsheng²  Batsanov, Andrei S.²  Bryce, Martin R.² 

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[2] Univ Durham, Dept Chem, Durham DH1 3LE, England

关键词: Carbazole;    Oxadiazole;    Fluorescence;    Donor-acceptor system;    Organic light-emitting device;   

DOI  :  10.1016/j.tet.2014.01.073

来源: Elsevier

【 摘 要 】

The synthesis is reported of a new molecule consisting of N-phenylcarbazole linked through a butadiyne bridge to 2,5-diphenyl-1,3,4-oxadiazole. The compound shows blue photoluminescence with positive solvatochromism: e.g., lambda(max) 401 nm in cyclohexane, 461 nm in chloroform solution (quantum yield phi(f) 0.55) and 428 nm in thin film, with a low intensity band extending to ca. 700 nm in films. OLEDs with a device configuration of [ITO/PEDOT:PSS (50 nm)/molecule:PVK:OXD-7 (80 nm)/Bphen (20 nm)/LiF (0.8 nm)/AI (120 nm)I were fabricated. Pure white-light emission with Commission Internationale De L'Eclairage (CIE) coordinates of (0.313, 0.330) at 13 V and good colour stability with a very small offset of coordinates (0.034, 0.033) under biases of 9-15 V has been achieved. (C) 2014 Elsevier Ltd. All rights

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