Weak epitaxy growth of metal-free phthalocyanine on p-sexiphenyl monolayer and double-layer films.
Weak epitaxy growth (WEG) can afford high-mobility thin films of disk-like organic semiconductor of which mobility is up to the level of the corresponding single crystals. We investigated the WEG behavior and mechanism of planar phthalocyanine in the model system of metal-free phthalocyanine (H2Pc) grown on p-sexiphenyl (p-6P) ultrathin films (monolayers and double layers). Highly oriented H2Pc films with molecules standing up exhibited two kinds of different in-plane orientations, i.e., three sets of in-plane orientations and only one set of in-plane orientation, on p-6P monolayer and double-layer films, respectively. The surface geometrical channels of p-6P substrate dominated the oriented nucleation and growth of H2Pc film. Consequently, the H2Pc film showed incommensurate and commensurate epitaxy on p-6P ultrathin films.
Yang
Junliang
J
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
Wang
Tong
T
Wang
Haibo
H
Zhu
Feng
F
Li
Gao
G
Yan
Donghang
D