Solution processable PEDOT:PSS based hybrid electrodes for organic field effect transistors |
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| Affiliation: | 1. Advanced Energy and Materials Research Center, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea;2. Department of Energy and Materials Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea;3. Department of Chemical and Biochemical Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea;4. Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea;1. Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea;2. School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea;3. Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea;4. Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea;1. School of Microelectronics and Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, Tianjin University, Road Weijin 92, Tianjin, 300072, China;2. Department of Electrical Engineering and Automation, Luoyang Institute of Science and Technology, Luoyang, 471023, China;1. Department of Advanced Organic Materials Engineering, Yeungnam University, Gyeongsan, 38541, South Korea;2. Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea;3. Department of Textile Engineering & Technology, Yeungnam University, Gyeongsan, 38541, South Korea;4. Department of Polymer Science and Engineering, Kyungpook National University, Daegu, 41566, South Korea;5. Department of Flexible and Printed Electronics, Chonbuk National University, Jeonju, 54896, South Korea;6. School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea;1. Department of Nanobio Materials and Electronics, School of Material Science and Engineering, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro (Oryong-dong), Buk-gu, Gwangju 500-712, Republic of Korea;2. Department of Energy and Materials Engineering, Dongguk University, 30, Pil-dong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea |
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| Abstract: | We report high performance solution processed conductive inks used as contact electrodes for printed organic field effect transistors (OFETs). Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) electrodes show highly improved very low sheet resistance of 65.8 ± 6.5 Ω/square (Ω/□) by addition of dimethyl sulfoxide (DMSO) and post treatment with methanol (MeOH) solvent. Sheet resistance was further improved to 33.8 ± 8.6 Ω/□ by blending silver nanowire (AgNW) with DMSO doped PEDOT:PSS. Printed OFETs with state of the art diketopyrrolopyrrole-thieno3,2-b]thiophene (DPPT-TT) semiconducting polymer were demonstrated with various solution processable conductive inks, including bare, MeOH treated PEDOT:PSS, single wall carbon nanotubes, and hybrid PEDOT:PSS-AgNW, as the source and drain (S/D) electrode by spray printing using a metal shadow mask. The highest field effect mobility, 0.49 ± 0.03 cm2 V?1 s?1 for DPPT-TT OFETs, was obtained using blended AgNW with DMSO doped PEDOT:PSS S/D electrode. |
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| Keywords: | PEDOT:PSS Silver nanowire Single wall carbon nanotube Organic field effect transistors Spray printing |
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