Document Detail

Organic thin-film-transistor Au/poly(3-hexylthiophene)/ (bilayer dielectrics)/Si having carbon nanotubes chemically bonded to poly(3-hexylthiophene) in the active layer.
MedLine Citation:
PMID:  24757975     Owner:  NLM     Status:  In-Process    
Using poly(3-hexylthiophene) (P3HT) covalently bonded with carbon nanotubes (CNT) as an active layer in a bottom-gate/top contact, Au/(P3HT)/(bilayer dielectric)/Si OTFT device has resulted in an enhanced charge transport. The CNTs were firstly functionalized via ligand exchange with ferrocene, next lithiated by sec-butyllithium (s-BuLi) and then linked anionically with P3HT which has been synthesized via the modified Grignard metathesis method. Compared to the pristine P3HT, the CNTs-containing P3HT composite material has a higher energy level of HOMO and a smaller electrochemical bandgap E(g)(chem). The smaller bandgap enhances the charge carrier transport and the higher HOMO energy level indicates a reduced barrier and an increased injection rate for charge carriers at the source contact. Furthermore, the threshold voltage V(T) of CNTs-containing P3HT samples is lower and its saturation current I(D) and the the field-effect mobility are higher. An OTFT device fabricated with such a composite sample containing 1.16% CNTs has a carrier mobility and saturation current three to five times higher than pristine P3HT.
Fang-Chi Li; Shin-Chi Tsai; Cheng-Yang Yeh; Je-Yuan Yeh; Ying-Shiun Chou; Jeng-Rong Ho; Raymond Chien-Chao Tsiang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of nanoscience and nanotechnology     Volume:  14     ISSN:  1533-4880     ISO Abbreviation:  J Nanosci Nanotechnol     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-04-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088195     Medline TA:  J Nanosci Nanotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5019-27     Citation Subset:  IM    
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