2015 Fiscal Year Research-status Report
Photoinduced Dedoping of Conducting Polymers: Patterning and Device Application
| Project/Area Number |
15K17927
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
衛 慶碩 国立研究開発法人産業技術総合研究所, ナノ材料研究部門, 研究員 (30709564)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | Semiconducting materials / Carrier Mobility / Carrier Concentration / Polymer / Photobase Generator |
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| Outline of Annual Research Achievements |
Exploring the various applications of conjugated polymers requires the systematic studies of their physical properties as a function of doping density, which consequently calls for the precise control of their doping density. In this year, we report a novel solid-state photoinduced charge-transfer reaction that dedopes highly conductive polyelectrolyte complexes such as poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate. Varying the UV-irradiation time of this material allows the carrier density inside the film to be precisely controlled over more than three orders of magnitude. We extract the carrier density, carrier mobility, and Seebeck coefficient at different doping levels to obtain a clear image of carrier transport mechanisms. This approach not only leads to a better understanding of the physical properties of the conducting polymer but also is useful for developing applications requiring patterned, large-area conducting polymers.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
We have successfully present the solid-state photoinduced dedoping reaction based on photobase generators combined with PEDOT/PSS. By varying the UV-irradiation time, the carrier density in these films is precisely controlled over more than three orders of magnitude. The carrier mobility in the film varies from 10－3 to 8.2 cm2 V－1s－1 depending on the carrier density. It almost based on the scheduled experiments.
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| Strategy for Future Research Activity |
The use of photoinduced dedoping not only provides a platform for understanding the physical properties of conducting polymers but also is useful for developing applications requiring patterned, large-area conducting polymers. Next step will be understanding other polymers and making working devices.
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| Causes of Carryover |
I am planing to MRS meeting in Boston but I was invited to give a talk in China at the same time. I accepted the invited talk, and the travel cost get lower.
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| Expenditure Plan for Carryover Budget |
I am trying to use it for acrticles cost and make a paper open access.
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