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Electrical conductivity of alternate layer deposition of pentancene and tetracene superlattices
Author(s) -
Minakata Takashi,
Mori Yoshihiko
Publication year - 1995
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1995.220060904
Subject(s) - tetracene , materials science , superlattice , thin film , sublimation (psychology) , acene , doping , pentacene , layer (electronics) , chemical engineering , nanotechnology , molecule , optoelectronics , organic chemistry , chemistry , thin film transistor , psychology , psychotherapist , engineering
Superlattice thin films of pentacene (PEN) and tetracene (TET) were fabricated by alternate layer deposition using the sublimation method. The film showed a highly crystalline structure that was due to the strong aggregation tendency of polyacene compounds to form a layered monomolecular column structure. The crystalline structure of the films was drastically changed by doping with iodine. The doped films showed a highly ordered structure where an iodine monomelecular layer was intercalated between molecular columns of acene compounds in both PEN and TET. The doped films exhibited a large lateral conductivity of 10 Ω −1 cm −1 and attained giant anisotropy above 10 12 . This indicated that molecular columns of TET remained insulating upon doping to form a perfect two‐dimensional conductor in the superlattice thin films.