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P‐165: Wet‐Processable Triphenylamine Dendrimers as Hole‐Transporting and Hole‐Injection Materials for Organic Light‐Emitting Devices
Author(s) -
Ichikawa Musubu,
Hibino Kumiko,
Yokoyama Norimasa,
Miki Tetsuzo,
Koyama Toshiki,
Taniguchi Yoshio
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785432
Subject(s) - triphenylamine , dendrimer , materials science , layer (electronics) , atom (system on chip) , glass transition , optoelectronics , nanotechnology , polymer chemistry , composite material , polymer , computer science , embedded system
We demonstrated two wet‐processable triphenylamine dendric nonamers: the nitrogen‐atom‐centered nonamer (TPA9‐1) and the phenyl‐centered nonamer (TPA9‐2). The materials were found to have high glass transition temperature (Tg) up to almost 200°C. The fractional difference of the central units of the molecular structures caused different adaptability due to the different ionization potentials (Ip). TPA9‐1 (N‐atom‐centered), whose Ip was smaller than that of TPA9‐2 (phenyl‐centered), was suitable as hole injection layer material, and TPA9‐2 was suitable as hole‐transporting layer material. Computational chemistry provides a ready explanation for the Ip difference between the two materials.