Poly(carbazole)-Based Copolymers Containing Deep-Blue Chromophore for Polymer Light-Emitting Diode Applications

✍ Scribed by Jin Su Park; Myungkwan Song; Sung-Ho Jin; Jae Wook Lee; Chan Woo Lee; Yeong-Soon Gal

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 293 KB
• Volume: 210
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200900207

✦ Synopsis

Abstract

A new series of two poly(carbazole)‐based copolymers (poly(9‐hexyl‐carbazole‐co‐9‐(6‐(3‐(4‐phenylquinolin‐2‐yl)carbazol‐9‐yl)hexyl)carbazole) (PCVz) and poly(9,9‐dioctylfluorene‐co‐9‐(6‐(3‐(4‐phenylquinolin‐2‐yl)carbazol‐9‐yl)hexyl)carbazole) (PFCVz)) containing carbazoylphenylquinoline pendant groups were synthesized via the Suzuki coupling reaction for polymer light‐emitting diode applications. The electro‐optical properties of ITO/PEDOT/Polymer/PBD/LiF/Al devices based on these copolymers were investigated using UV‐visible, photoluminescence, and electroluminescence spectroscopy. The turn‐on voltages of the copolymer devices were found to be 6.0–8.0 V. The maximum brightness and luminescence efficiency of the copolymers device were found to be 230 cd · m^−2^ and 0.28 cd · A^−1^ at 11 V, respectively.

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