Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region
Abstract Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a prototypical conducting polymer. When a polar solvent is used during film fabrication, the hole-doped PEDOT oligomers form crystalline clusters in the films, exhibiting high conductivity. However, whether hole carrier...
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| Format: | Article |
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Nature Portfolio
2024-03-01
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| Series: | Communications Materials |
| Online Access: | https://doi.org/10.1038/s43246-024-00451-1 |
| _version_ | 1797266708929445888 |
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| author | Zijing Guo Tetsu Sato Yang Han Naoki Takamura Ryohei Ikeda Tatsuya Miyamoto Noriaki Kida Makiko Ogino Youtarou Takahashi Naotaka Kasuya Shun Watanabe Jun Takeya Qingshuo Wei Masakazu Mukaida Hiroshi Okamoto |
| author_facet | Zijing Guo Tetsu Sato Yang Han Naoki Takamura Ryohei Ikeda Tatsuya Miyamoto Noriaki Kida Makiko Ogino Youtarou Takahashi Naotaka Kasuya Shun Watanabe Jun Takeya Qingshuo Wei Masakazu Mukaida Hiroshi Okamoto |
| author_sort | Zijing Guo |
| collection | DOAJ |
| description | Abstract Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a prototypical conducting polymer. When a polar solvent is used during film fabrication, the hole-doped PEDOT oligomers form crystalline clusters in the films, exhibiting high conductivity. However, whether hole carriers exhibit band transport has not been clarified yet. Here, we employ a multilayer spin-coating method using an aqueous solution with ethylene glycol, with additional procedures of dipping the films in ethylene glycol or dropping sulfuric acid onto the films, to achieve a high DC conductivity of ∼1000 S cm−1 or higher. Using terahertz time-domain spectroscopy and far-infrared-to-ultraviolet reflection spectroscopy, we derive complex optical conductivity $$\widetilde{\sigma }$$ σ ̃ spectra, which are reproduced by the sum of the Drude response, and Lorentz-oscillator responses due to phonons. These results demonstrate the band transport, which is further confirmed by the Hall effect measurements. The hole mobility estimated from the spectral analyses is 7–11 cm2 V−1 s−1, a significantly large value. The reported evaluation methods for broadband $$\widetilde{\sigma }$$ σ ̃ spectra can help elucidate carrier transport mechanisms in various conducting films. |
| first_indexed | 2024-04-25T01:05:00Z |
| format | Article |
| id | doaj.art-7edd0ee011144eec9254b65d358a591c |
| institution | Directory Open Access Journal |
| issn | 2662-4443 |
| language | English |
| last_indexed | 2024-04-25T01:05:00Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Materials |
| spelling | doaj.art-7edd0ee011144eec9254b65d358a591c2024-03-10T12:18:10ZengNature PortfolioCommunications Materials2662-44432024-03-015111310.1038/s43246-024-00451-1Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet regionZijing Guo0Tetsu Sato1Yang Han2Naoki Takamura3Ryohei Ikeda4Tatsuya Miyamoto5Noriaki Kida6Makiko Ogino7Youtarou Takahashi8Naotaka Kasuya9Shun Watanabe10Jun Takeya11Qingshuo Wei12Masakazu Mukaida13Hiroshi Okamoto14Department of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Applied Physics and Quantum Phase Electronics Center, University of TokyoDepartment of Applied Physics and Quantum Phase Electronics Center, University of TokyoDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaDepartment of Advanced Materials Science, University of Tokyo, KashiwaNational Institute of Advanced Industrial Science and Technology (AIST)-University of Tokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL)National Institute of Advanced Industrial Science and Technology (AIST)-University of Tokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL)Department of Advanced Materials Science, University of Tokyo, KashiwaAbstract Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a prototypical conducting polymer. When a polar solvent is used during film fabrication, the hole-doped PEDOT oligomers form crystalline clusters in the films, exhibiting high conductivity. However, whether hole carriers exhibit band transport has not been clarified yet. Here, we employ a multilayer spin-coating method using an aqueous solution with ethylene glycol, with additional procedures of dipping the films in ethylene glycol or dropping sulfuric acid onto the films, to achieve a high DC conductivity of ∼1000 S cm−1 or higher. Using terahertz time-domain spectroscopy and far-infrared-to-ultraviolet reflection spectroscopy, we derive complex optical conductivity $$\widetilde{\sigma }$$ σ ̃ spectra, which are reproduced by the sum of the Drude response, and Lorentz-oscillator responses due to phonons. These results demonstrate the band transport, which is further confirmed by the Hall effect measurements. The hole mobility estimated from the spectral analyses is 7–11 cm2 V−1 s−1, a significantly large value. The reported evaluation methods for broadband $$\widetilde{\sigma }$$ σ ̃ spectra can help elucidate carrier transport mechanisms in various conducting films.https://doi.org/10.1038/s43246-024-00451-1 |
| spellingShingle | Zijing Guo Tetsu Sato Yang Han Naoki Takamura Ryohei Ikeda Tatsuya Miyamoto Noriaki Kida Makiko Ogino Youtarou Takahashi Naotaka Kasuya Shun Watanabe Jun Takeya Qingshuo Wei Masakazu Mukaida Hiroshi Okamoto Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region Communications Materials |
| title | Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region |
| title_full | Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region |
| title_fullStr | Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region |
| title_full_unstemmed | Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region |
| title_short | Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region |
| title_sort | band transport evidence in pedot pss films using broadband optical spectroscopy from terahertz to ultraviolet region |
| url | https://doi.org/10.1038/s43246-024-00451-1 |
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