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Time‐of‐flight mobilities for conducting dendrimers composed of p ‐phenylenevinylene dendron and triphenylamine surface group
Author(s) -
Mizusaki Masanobu
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34925
Subject(s) - dendrimer , triphenylamine , materials science , polymer chemistry , chemical physics , chemistry
Charge‐carrier transport property of the conducting dendrimer films composed of p ‐phenylenevinylene with generation numbers of two and three as a dendron and triphenylamine as a surface group, which were prepared by spin‐coating from the chloroform solutions, was investigated by a time‐of‐flight technique. For both dendrimer films, hole‐carrier transport took place preferentially compared with electron‐carrier transport, and typical dispersive hole‐carrier transport was observed. The hole‐carrier drift mobilities of the two‐generation dendrimer film were one order of magnitude larger than those of the three‐generation dendrimer film. The difference of the hole‐carrier drift mobilities between the two‐generation and three‐generation dendrimers was due to the difference of the molecular geometric structure and/or the difference of the molecular weight ratio of nitrogen atom in the triphenylamine unit to the dendrimer molecule. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012