TY - JOUR
T1 - Observation of ambipolar field-effect behavior in donor-acceptor conjugated copolymers
AU - Cho, Shinuk
AU - Seo, Jung Hwa
AU - Kim, Gi Hwan
AU - Kim, Jin Young
AU - Woo, Han Young
PY - 2012/10/21
Y1 - 2012/10/21
N2 - Although donor (D)-acceptor (A) conjugated copolymers possess an electron deficient unit, most D-A copolymers exhibit only hole transport properties (p-type). While there are some D-A copolymers that show ambipolarity, n-type behaviour is highly dependent on the type of acceptor used. In this work, ambipolar field-effect behaviour was derived from general D-A conjugated copolymers, believed to be a typical p-type material, by introducing a functional passivation layer between gate dielectric and active layers using polypropylene-co-1-butene (PPcB). The PPcB layer effectively covered the hydroxyl groups and induced a reduction in the energetic disorder at the semiconductor-insulator interface. As a result, the FET devices fabricated using D-A conjugated copolymers, such as PCDTBT, PTBT and Si-PCPDTBT, showed clear ambipolar properties.
AB - Although donor (D)-acceptor (A) conjugated copolymers possess an electron deficient unit, most D-A copolymers exhibit only hole transport properties (p-type). While there are some D-A copolymers that show ambipolarity, n-type behaviour is highly dependent on the type of acceptor used. In this work, ambipolar field-effect behaviour was derived from general D-A conjugated copolymers, believed to be a typical p-type material, by introducing a functional passivation layer between gate dielectric and active layers using polypropylene-co-1-butene (PPcB). The PPcB layer effectively covered the hydroxyl groups and induced a reduction in the energetic disorder at the semiconductor-insulator interface. As a result, the FET devices fabricated using D-A conjugated copolymers, such as PCDTBT, PTBT and Si-PCPDTBT, showed clear ambipolar properties.
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U2 - 10.1039/c2jm34872a
DO - 10.1039/c2jm34872a
M3 - Article
AN - SCOPUS:84870403606
SN - 0959-9428
VL - 22
SP - 21238
EP - 21241
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 39
ER -