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Synergistic Effects of Doping and Thermal Treatment on Organic Semiconducting Nanowires

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journal contribution
posted on 02.09.2015 by Sung-Yong Min, Young-Hoon Kim, Christoph Wolf, Tae-Woo Lee
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.