Processing temperature control of a diketopyrrolopyrrole-alt-thieno[2,3-b]thiophene polymer for high-mobility thin-film transistors and polymer solar cells with high open-circuit voltages
- Korea Institute of Science and Technology (KIST), Seoul (Republic of Korea); Korea Univ., Seoul (Republic of Korea)
- Sungkyunkwan Univ., Suwon (Republic of Korea)
- Ewha Womans Univ., Seoul (Republic of Korea)
- Sogang Univ., Seoul (Republic of Korea); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sogang Univ., Seoul (Republic of Korea)
Here, we synthesized a planar pDPPTTi-OD polymer based on diketopyrrolopyrrole (DPP) and thieno [2,3-b] thiophene (TTi) and investigated the electrical properties of the pDPPTTi-OD polymer. pDPPTTi-OD films displayed a low optical bandgap of 1.57 eV, and HOMO and LUMO levels of –5.40 and –3.74 eV, respectively. The 150°C-annealed pDPPTTi-OD films showed a high hole mobility of 0.16 cm2V–1s–1 in organic thin-film transistor (OTFT) devices. The photovoltaic properties of polymer solar cells (PSCs) incorporating the pDPPTTi-OD were also measured. A pDPPTTi-OD:PC71BM blend film was spin-coated at 25, 70 and 90 °C. High-temperature processing significantly improved the power conversion efficiency of PSCs by effectively reducing the PC71BM domain sizes, which improved the miscibility between pDPPTTi-OD and PC71BM. Furthermore, this work demonstrated that the TTi moiety is a useful donor building block for high-performance D–A type polymers in OTFTs and PSCs, and that processing temperatures should be controlled to fully realize the materials' beneficial intrinsic properties.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Research Foundation of Korea (NRF); USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1481879
- Journal Information:
- Polymer, Vol. 105, Issue C; ISSN 0032-3861
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Synthesis and Characterization of Cyclopentadithiophene and Thienothiophene-Based Polymers for Organic Thin-Film Transistors and Solar Cells
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journal | June 2018 |
Small isomeric push–pull chromophores based on thienothiophenes with tunable optical (non)linearities
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journal | January 2019 |
Aggregation behavior in naphthalene-appended diketopyrrolopyrrole derivatives and its gas adsorption impact on surface potential
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journal | January 2019 |
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