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Tetraaryl‐Substituted Benzo[1,2‐ b :4,5‐ b ′]dipyrroles: Synthesis, Properties, and Applications to Hole‐Injection Materials in OLED Devices
Author(s) -
Tsuji Hayato,
Yokoi Yuki,
Mitsui Chikahiko,
Ilies Laurean,
Sato Yoshiharu,
Nakamura Eiichi
Publication year - 2009
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200800471
Subject(s) - oled , pedot:pss , diode , voltage , layer (electronics) , materials science , optoelectronics , zinc , chemistry , electrical engineering , nanotechnology , engineering , metallurgy
Yes, HIMs can! A series of 2,3,6,7‐tetraarylbenzo[1,2‐ b :4,5‐ b ′]dipyrroles (BDPs) were synthesized using zinc‐mediated double cyclization. Organic light‐emitting diodes consisting of BDP:PPB as a hole‐injection layer could be driven at a lower voltage than a PEDOT:PSS‐based device. Correlation of the IP values with the driving voltage shed some light on the mechanism of hole‐injection processes.