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

Lee, Hyo -Sang; Lee, Joong Suk; Jung, A-Ra; Cha, Wonsuk; Kim, Hyunjung; Son, Hae Jung; Cho, Jeong Ho; Kim, BongSoo

doi:10.1016/j.polymer.2016.10.024

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

Journal Article · Thu Oct 13 00:00:00 EDT 2016 · Polymer

DOI:https://doi.org/10.1016/j.polymer.2016.10.024· OSTI ID:1481879

Lee, Hyo -Sang ^[1]; Lee, Joong Suk ^[2]; Jung, A-Ra ^[3]; Cha, Wonsuk ^[4]; Kim, Hyunjung ^[5]; Son, Hae Jung ^[1]; Cho, Jeong Ho ^[2]; ^[3]

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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Research Foundation (NRF) of Korea; USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1481879

Journal Information:: Polymer, Journal Name: Polymer Journal Issue: C Vol. 105; ISSN 0032-3861

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Aggregation behavior in naphthalene-appended diketopyrrolopyrrole derivatives and its gas adsorption impact on surface potential Dutta, Gitish K.; Kasthuri, S.; Marappan, Gobinath Journal of Materials Chemistry C, Vol. 7, Issue 32 https://doi.org/10.1039/c9tc02226k	journal	January 2019

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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

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