Effects of P3HT concentration on the performance of organic field effect transistors |
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| Authors: | Chun-xia Jiang |
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| Affiliation: | (1) Department of Electronics, Helmut-Schmidt-University/University of the Federal Armed Forces Hamburg, Holstenhofweg 85, 22043 Hamburg, Germany;(2) Institute of Automation Technology, Helmut-Schmidt-University/University of the Federal Armed Forces Hamburg, Holstenhofweg 85, 22043 Hamburg, Germany |
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| Abstract: | Top-contact organic field effect transistors (OFETs) based on poly(3-hexylthiophene) (P3HT) with different concentrations
in chloroform (CHCl3) are fabricated. The output characteristics indicate that the P3HT concentration has significant influence on the OFET devices.
The performance of the devices firstly is enhanced with increasing the P3HT concentration, and then decreases. The optimized
devices with the P3HT concentration of 2 mg/mL show the best performance. The field0effect mobility is up to 1.4×10−2 cm2/Vs, the threshold voltage (V
t) is as low as −20 V, and the current on/off ratio (I
on/off) is close to the order of 104. The results suggest that the P3HT aggregation patterns induced by different concentrations can improve the performance of
the OFETs. |
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| Keywords: | |
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