Periodic array of polyelectrolyte-gated organic transistors from electrospun poly(3-hexylthiophene) nanofibers.
High-performance organic field-effect transistors (OFETs) based on polyelectrolyte gate dielectric and electrospun poly(3-hexylthiophene) (P3HT) nanofibers were fabricated on a flexible polymer substrate. The use of UV-crosslinked hydrogel including ionic liquids for the insulating layer enabled fast and large-area fabrication of transistor arrays. The P3HT nanofibers were directly deposited on the methacrylated polymer substrate. During UV irradiation through a patterned mask, the methacrylate groups formed covalent bonds with the patterned polyelectrolyte dielectric layer, which provides mechanical stability to the devices. The OFETs operate at voltages of less than 2 V. The average field-effect mobility and on/off ratio were approximately 2 cm(2)/(Vs) and 10(5), respectively.
Lee
Sung W
SW
Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seoul, Korea.
Lee
Hyun J
HJ
Choi
Ji H
JH
Koh
Won G
WG
Myoung
Jae M
JM
Hur
Jae H
JH
Park
Jong J
JJ
Cho
Jeong H
JH
Jeong
Unyong
U