5 years ago

Diketopyrrolopyrrole-Porphyrin Based Conjugated Polymers for Ambipolar Field-Effect Transistors

Diketopyrrolopyrrole-Porphyrin Based Conjugated Polymers for Ambipolar Field-Effect Transistors
Jianqi Zhang, Yonggang Wu, Shichao Zhou, Yaping Yu, Andong Zhang, Weiwei Li, Cheng Li
Porphyrin-based molecules have been widely used in dye-sensitized solar cells and bulk heterojunction solar cells, but their application in field-effect transistors (FETs) is limited. In this work, two conjugated polymers based on diketopyrrolopyrrole and porphyrin units were developed for FETs. The polymers exhibit extra-low band gap with energy levels close to −4.0 eV and −5.0 eV due to the strong electron-donating and withdrawing ability of porphyrin and diketopyrrolopyrrole. With additionally high crystalline properties, ambipolar charge carrier transports with a hole mobility of 0.1 cm2 V−1 s−1 in FETs were realized in these polymers, representing the highest performance in solution-processed FETs based on porphyrin unit. Mind the gap: Small-band-gap diketopyrrolopyrrole-porphyrin based conjugated polymers were developed for application in ambipolar organic field-effect transistors, in which the hole and electron mobility of 0.1 and 0.004 cm2 V−1 s−1 was achieved.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/asia.201700472

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