P-type doped ambipolar polymer transistors by direct charge transfer from a cationic organic dye Pyronin B ferric chloride
- 저자
- Gunel Huseynova, Yong Xu, Benjamin Nketia Yawson, Eul-Yong Shin, Mi Jung Lee*, Yong-Young Noh*
- 저널명
- Organic Electronics, 39, 229-235 (2016)
- 년도
- 2016
- Link
- https://doi.org/10.1016/j.orgel.2016.10.012 152회 연결
[Abstract]
We report a facile way to improve organic field effect transistor (OFET) performance based on low concentration doping of diketopyrrolopyrrole-thieno[3,2-b]thiophene (DPPT-TT) solution by an organic cationic dye, Pyronin B (PyB). DPPT-TT OFETs show significantly high field effect mobilities (up to 3.5 cm2 V−1 s−1) by optimizing the doping ratio and solvent selection. The devices also exhibit better on/off ratio by suppression of n-channel characteristics. Ultraviolet photoelectron spectroscopy and UV–vis absorption spectra revealed efficient p-type doping in PyB doped DPPT-TT films, which was confirmed by the Fermi level shifting toward the highest occupied molecular orbital and red shift of the absorption spectrum.