Lithium benzoate doped high performance n-type diketopyrrolopyrrole based organic thin-film transistors
- 저자
- Gunel Huseynova, Eul-Yong Shin, Won-Tae Park, Yong-Young Noh*
- 저널명
- Dyes and Pigments, 162, 243-248 (2019)
- 년도
- 2019
- Link
- https://doi.org/10.1016/j.dyepig.2018.10.032 185회 연결
[Abstract]
We report lithium benzoate (LB) as an effective electron dopant for commonly used diketopyrrolopyrrole (DDP) based electron donor-acceptor conjugated polymers and its application in organic thin-film transistors (OTFTs). Three DPP derivative classes were considered: ambipolar, electron dominant, and hole dominant semiconducting polymers. Applying LB dopant at the contact or semiconducting layer bulk significantly improved overall n-channel performance more than 100-fold, such as electron mobility and on/off current ratio for solution-processed DPP based OTFTs compared with pristine devices. The best DPP based OTFTs with LB achieved high electron mobility (0.6 cm2 V−1 s−1) with excellent operational stability. In particular, complete ambipolar transport modulation to unipolar n-type was achieved for n-channel dominant OTFTs devices.