Donor unit effect on DPP based organic field-effect transistor performance
- 저자
- Tomotsugu Takaya, Melaku Dereje Mamo, Makoto Karakawa*, Yong-Young Noh*
- 저널명
- Dyes and Pigments, 158, 306-311 (2018)
- 년도
- 2018
- Link
- https://doi.org/10.1016/j.dyepig.2018.05.062 148회 연결
[Abstract]
We report diketopyrrolopyrrole (DPP) based copolymers, poly (diketopyrrolopyrrole-cyclopentadithiophene) (PDPPTT-CPDT) and poly(diketopyrrolopyrrolebenzo[1,2-b:4,5-b’]dithiophene) (PDPPTT-BDT) to investigate donor unit structure effects on organic field-effect transistor (OFET) performance. The highest occupied molecular orbital (HOMO) level and copolymer band gap were tuned by introducing different donor units on the acceptor DPP backbone. PDPPTT-BDT OFETs show 10 fold higher hole field-effect mobility, up to 0.08 cm2 V−1 s−1, than PDPPTT-CPDT OFETs due to better crystallinity and higher HOMO energetic levels. PDPPTT-CPDT and PDPPTT-BDT were operationally stable with negligible threshold voltage shift after cycling.