4.5 Article

Blue organic light-emitting materials based on diphenylaminofluorene and N-phenylcarbazole derivatives

Journal

SYNTHETIC METALS
Volume 159, Issue 23-24, Pages 2603-2608

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2009.09.018

Keywords

Blue-emitting materials; Diphenylaminofluorene derivatives; N-Phenylcarbazole derivatives; OLEDs

Funding

  1. Korea Science and Engineering Foundation [20090073679]
  2. Korea Evaluation Institute of Industrial Technology (KEIT) [10030834] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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A series of diphenylaminofluorene- and phenylcarbazole-derived, blue fluorescent molecules have been synthesized via the Hornor-Wadsworth-Emmons and Suzuki-cross coupling reactions. To explore the electroluminescent properties of these molecules, multilayer devices were fabricated with a structure of ITO/NPB(1-6) doped in MADN/Bphen/Liq/Al, yielding a device that exhibited highly efficient sky-blue emissions with the luminous efficiency of 11.2 cd/A at 20 mA/cm(2), a power efficiency of 7.35 Im/W at 20 mA/cm(2), and CIEx,y coordinates of (x=0.16, y=0.26) at 8 V. Also, a deep blue CLED with CIEx,y coordinates of (x=0.16, y=0.13) at 8 V showed a luminous efficiency of 2.13 cd/A and power efficiency of 1.20 Im/W at 20 mA/cm(2), respectively. (C) 2009 Elsevier B.V. All rights reserved.

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