期刊
POLYMER CHEMISTRY
卷 4, 期 20, 页码 5337-5344出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3py00089c
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资金
- NTC Weiz GmbH
- Styrian Government [BioOFET 2, GZ:A3-11. B-36/2010-5]
- [Transregio SFB TR 49]
We report on a novel air-stable p-type heterotriangulene polymer (PTA) for large-area organic field-effect transistor (OFET) applications. The newly synthesized amorphous organic semiconductor was characterized concerning morphological, optical, electrical and interface related properties and revealed a saturation mobility of similar to 4.2 x 10(-3) cm(2) V-1 s(-1) and an on/off current ratio of similar to 10(5) in bottom-gate/bottom-contact (BG/BC) OFETs. The influence of several interface modifications was investigated in order to optimize the device performance. PTA FETs exhibited excellent air stability over several months and a superior performance compared to the widely used poly(3-hexylthiophene)-based OFETs. Moreover, we show that hydrochloric acid in chloroform leads to protonation of the nitrogen atoms on the PTA polymer, resulting in a significant change of the electrical characteristics of OFETs.
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