Polymer light-emitting diodes with doped hole-transport layers

✍ Scribed by Lu, Mingtao ;Nicolai, Herman T. ;Kuik, Martijn ;Wetzelaer, Gert-Jan A. H. ;Wildeman, Jurjen ;Palmaerts, Arne ;Blom, Paul W. M.

• Book ID: 105366586
• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 586 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127319

✦ Synopsis

Abstract

We demonstrate a solution processed bi‐layer PLED based on poly(p‐phenylene vinylene) derivatives using orthogonal solvents. To lower the voltage drop the hole transport layer (HTL) based on poly[2,5‐bis(2′‐ethylhexyloxy)‐co‐2,5‐bis(butoxy)‐1,4‐phenylenevinylene] (BEH/BB‐PPV (1:3)) is doped with tetracyano‐tetrafluoro‐quinodimethane (F4TCNQ). The conductivity of BEH/BB‐PPV (1:3) was observed to increase by two orders of magnitude upon doping with F4TCNQ. The doped HTL was observed to lower the operating voltage of a double layer PLED, but suffers from additional quenching by the dopant at higher voltages due to the lack of an electron blocking functionality.