- Title
- Tuning the Charge Carrier Polarity of Organic Transistors by Varying the Electron Affinity of the Flanked Units in Diketopyrrolopyrrole-Based Copolymers
- Creator
- Liu, Qian; Wang, Yang; Kohara, Akihiro; Matsumoto, Hidetoshi; Manzhos, Sergei; Feron, Krishna; Bottle, Steven E.; Bell, John; Michinobu, Tsuyoshi; Sonar, Prashant
- Relation
- ARC.FT130101337 http://purl.org/au-research/grants/arc/FT130101337
- Relation
- Advanced Functional Materials Vol. 30, Issue 7, no. 1907452
- Publisher Link
- http://dx.doi.org/10.1002/adfm.201907452
- Publisher
- Wiley-Blackwell
- Resource Type
- journal article
- Date
- 2020
- Description
- Fine-tuning of the charge carrier polarity in organic transistors is an important step toward high-performance organic complementary circuits and related devices. Here, three new semiconducting polymers, namely, pDPF-DTF2, pDPSe-DTF2, and pDPPy-DTF2, are designed and synthesized using furan, selenophene, and pyridine flanking group-based diketopyrrolopyrrole cores, respectively. Upon evaluating their electrical properties in transistor devices, the best performance has been achieved for pDPSe-DTF2 with the highest and average hole mobility of 1.51 and 1.22 cm2 V−1 s−1, respectively. Most intriguingly, a clear charge-carrier-polarity change is observed when the devices are measured under vacuum. The pDPF-DTF2 polymer exhibits a balanced ambipolar performance with the µh/µe ratio of 1.9, whereas pDPSe-DTF2 exhibits p-type dominated charge carrier transport properties with the µh/µe ratio of 26.7. Such a charge carrier transport change is due to the strong electron-donating nature of the selenophene. Furthermore, pDPPy-DTF2 with electron-withdrawing pyridine flanking units demonstrates unipolar n-type charge transport properties with an electron mobility as high as 0.20 cm2 V−1 s−1. Overall, this study demonstrates a simple yet effective approach to switch the charge carrier polarity in transistors by varying the electron affinity of flanking groups of the diketopyrrolopyrrole unit.
- Subject
- charge carrier polarity; copolymers; diketopyrrolopyrrole; electron affinity; organic transistors
- Identifier
- http://hdl.handle.net/1959.13/1440387
- Identifier
- uon:41142
- Identifier
- ISSN:1616-301X
- Rights
- This is the peer reviewed version of the following article: Liu, Qian; Wang, Yang; Kohara, Akihiro; Matsumoto, Hidetoshi; Manzhos, Sergei; Feron, Krishna; Bottle, Steven E.; Bell, John; Michinobu, Tsuyoshi; Sonar, Prashant. “Tuning the Charge Carrier Polarity of Organic Transistors by Varying the Electron Affinity of the Flanked Units in Diketopyrrolopyrrole-Based Copolymers”. Advanced Functional Materials Vol. 30, Issue 7, no. 1907452 (2020), which has been published in final form at http://dx.doi.org/10.1002/adfm.201907452. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. This manuscript version licensed under CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/).
- Language
- eng
- Full Text
- Reviewed
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