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Electron transport with mobility above 10 –3 cm 2 /Vs in amorphous film of co‐planar bipyridyl‐substituted oxadiazole
Author(s) -
Ichikawa Musubu,
Hiramatsu Nobuyasu,
Yokoyama Norimasa,
Miki Tetsuzo,
Narita Susumu,
Koyama Toshiki,
Taniguchi Yoshio
Publication year - 2007
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200600051
Subject(s) - oxadiazole , steric effects , amorphous solid , planar , substituent , electron , electron mobility , crystallography , chemistry , solid state , materials science , stereochemistry , physics , organic chemistry , optoelectronics , nuclear physics , computer graphics (images) , computer science
We demonstrate that a bipyridyl substituted oxadiazole (Bpy‐OXD) shows high electron mobility that reached above 10 –3 cm 2 /Vs. We believe that the high mobility results from both the hybrid molecular structure of the two electron‐accepting units: bipyridyl and oxadiazole, and the planar molecular structure based on its lack of sterically hindered bulky substituent. The computational analysis elucidates that the amorphous nature of Bpy‐OXD in thin‐film state probably results from the polymorphic effect in isolated state and the volume effect in solid state. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)