Synergistic Effects of Doping and Thermal Treatment on Organic Semiconducting Nanowires.
Doping of small molecular donors or acceptors on conjugated organic materials can be used to improve the performance of organic electronics. Here we demonstrate highly aligned poly(3-hexylthiophene) (P3HT) nanowires (NWs) doped with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) using electrohydrodynamic organic NW printing. The transistor based on p-doped NWs had an order of magnitude higher mobility than did the undoped NW device. This significant improvement resulted from the synergistic effects of p-type doping and thermal annealing on F4-TCNQ-doped P3HT NWs, which induce microstructure changes in P3HT chains.
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Republic of Korea.
Sung-Yong
SY
Min
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Republic of Korea.
Young-Hoon
YH
Kim
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Republic of Korea.
Christoph
C
Wolf
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Republic of Korea.
Tae-Woo
TW
Lee
electrohydrodynamic organic nanowire printing; organic field-effect transistors; p-type dopant; polymer microstructure; thermal annealing