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Title: 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

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 cm 2V –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:PC 71BM 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 PC 71BM domain sizes, which improved the miscibility between pDPPTTi-OD and PC 71BM. 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [2] ; ORCiD logo [3]
  1. Korea Institute of Science and Technology (KIST), Seoul (Republic of Korea); Korea Univ., Seoul (Republic of Korea)
  2. Sungkyunkwan Univ., Suwon (Republic of Korea)
  3. Ewha Womans Univ., Seoul (Republic of Korea)
  4. Sogang Univ., Seoul (Republic of Korea); Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Sogang Univ., Seoul (Republic of Korea)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Polymer
Additional Journal Information:
Journal Volume: 105; Journal Issue: C; Journal ID: ISSN 0032-3861
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Research Foundation of Korea (NRF); USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; carrier mobility; photovoltaic performance; processing temperature
OSTI Identifier:
1481879

Lee, Hyo -Sang, Lee, Joong Suk, Jung, A-Ra, Cha, Wonsuk, Kim, Hyunjung, Son, Hae Jung, Cho, Jeong Ho, and Kim, BongSoo. 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. United States: N. p., Web. doi:10.1016/j.polymer.2016.10.024.
Lee, Hyo -Sang, Lee, Joong Suk, Jung, A-Ra, Cha, Wonsuk, Kim, Hyunjung, Son, Hae Jung, Cho, Jeong Ho, & Kim, BongSoo. 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. United States. doi:10.1016/j.polymer.2016.10.024.
Lee, Hyo -Sang, Lee, Joong Suk, Jung, A-Ra, Cha, Wonsuk, Kim, Hyunjung, Son, Hae Jung, Cho, Jeong Ho, and Kim, BongSoo. 2016. "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". United States. doi:10.1016/j.polymer.2016.10.024. https://www.osti.gov/servlets/purl/1481879.
@article{osti_1481879,
title = {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},
author = {Lee, Hyo -Sang and Lee, Joong Suk and Jung, A-Ra and Cha, Wonsuk and Kim, Hyunjung and Son, Hae Jung and Cho, Jeong Ho and Kim, BongSoo},
abstractNote = {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.},
doi = {10.1016/j.polymer.2016.10.024},
journal = {Polymer},
number = C,
volume = 105,
place = {United States},
year = {2016},
month = {10}
}