Journal
OPTICAL MATERIALS
Volume 21, Issue 1-3, Pages 225-229Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0925-3467(02)00141-6
Keywords
electroluminescence; carbazole derivatives; blue emitting material
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We synthesized bis(3-N-ethylcarbazolyl) terephthalidene (BECP) and bis(3-N-ethylcarbazolyl) cyano-terephthalidene and characterized electroluminescence properties of these materials. Our device shows a strong blue emission at 472 nm with a luminance efficiency of 0.9 lm/W at a voltage, a current density, and a brightness of 8 V, 5.7 mA/cm(2) and 130 cd/m(2), respectively and shows typical rectifying diode characteristics in ITO/CuPc/TPD/BECP/Bu-PBD or Alq(3)/LiF/Al device. (C) 2002 Elsevier Science B.V. All rights reserved.
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