Investigation of the Thermoelectric Power Factor of KOH-Treated PEDOT:PSS Dispersions for Printing Applications
This work studies the modification of commercially available dispersions of intrinsically conductive polymer PEDOT:PSS with a strong base, KOH. It is concluded that addition of base derives a dedoping of the PEDOT chain and increase Seebeck coefficient from 15 µV/K to 90 µV/K. Supportive UV-Vis-NIR...
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| Veröffentlicht in: | Energy harvesting and systems 2016-01, Vol.3 (1), p.101-111 |
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| creator | Stepien, Lukas Roch, Aljoscha Schlaier, Sarah Dani, Ines Kiriy, Anton Simon, Frank Lukowicz, Marian v. Leyens, Christoph |
| description | This work studies the modification of commercially available dispersions of intrinsically conductive polymer PEDOT:PSS with a strong base, KOH. It is concluded that addition of base derives a dedoping of the PEDOT chain and increase Seebeck coefficient from 15 µV/K to 90 µV/K. Supportive UV-Vis-NIR spectroscopy was used for tracking the doping level of the polymer. A surface morphology study of the dedoped PEDOT:PSS films was monitored by SEM. It was shown that if KOH is used in excess with respect to the acid component of PEDOT:PSS dispersions, it segregates at the surface forming crystallites. They, however could be easily removed by methanol rinsing without destroying the sample integrity. After material modification, a dispenser-printed polymer unileg-TEG with 61 unicouples was fabricated by printing. The TEG in form of 253 mm-long stripe shows a flexible behavior. At 90 K temperature difference a resulting power output of ~ 100 nW could be measured. We suggest that the low power output is due to a high internal generator resistance. |
| doi_str_mv | 10.1515/ehs-2014-0060 |
| format | Article |
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It is concluded that addition of base derives a dedoping of the PEDOT chain and increase Seebeck coefficient from 15 µV/K to 90 µV/K. Supportive UV-Vis-NIR spectroscopy was used for tracking the doping level of the polymer. A surface morphology study of the dedoped PEDOT:PSS films was monitored by SEM. It was shown that if KOH is used in excess with respect to the acid component of PEDOT:PSS dispersions, it segregates at the surface forming crystallites. They, however could be easily removed by methanol rinsing without destroying the sample integrity. After material modification, a dispenser-printed polymer unileg-TEG with 61 unicouples was fabricated by printing. The TEG in form of 253 mm-long stripe shows a flexible behavior. At 90 K temperature difference a resulting power output of ~ 100 nW could be measured. 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It is concluded that addition of base derives a dedoping of the PEDOT chain and increase Seebeck coefficient from 15 µV/K to 90 µV/K. Supportive UV-Vis-NIR spectroscopy was used for tracking the doping level of the polymer. A surface morphology study of the dedoped PEDOT:PSS films was monitored by SEM. It was shown that if KOH is used in excess with respect to the acid component of PEDOT:PSS dispersions, it segregates at the surface forming crystallites. They, however could be easily removed by methanol rinsing without destroying the sample integrity. After material modification, a dispenser-printed polymer unileg-TEG with 61 unicouples was fabricated by printing. The TEG in form of 253 mm-long stripe shows a flexible behavior. At 90 K temperature difference a resulting power output of ~ 100 nW could be measured. We suggest that the low power output is due to a high internal generator resistance.</description><subject>base</subject><subject>Conducting polymers</subject><subject>Crystallites</subject><subject>de-doping</subject><subject>Dispersions</subject><subject>flexible</subject><subject>intrinsically conducting polymer</subject><subject>PEDOT:PSS</subject><subject>pH value</subject><subject>Polymers</subject><subject>Power factor</subject><subject>printing</subject><subject>Seebeck effect</subject><subject>thermoelectric generator</subject><issn>2329-8774</issn><issn>2329-8766</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kEtLw0AUhYMoWGqX7gdcR-fOI4_uSh-2WGig2YfJZNKmpJk4k1r6751YERfi6p7Fd8_hHM97BPwMHPiL2lufYGA-xgG-8QaEktiPwiC4_dEhu_dG1h4wxkA4DyEaeHrVfCjbVTvRVbpBukTdXqF0r8xRq1rJzlQSJfqsDFoI2WnTI2-bpZ8aJTpVoGQ-26TjZLtFs8q2ylhnY1HpwMRUTVc1OzRp27qSXwH2wbsrRW3V6PsOvXQxT6dLf715XU0na18yzME1CWNOKTBgeSwwIYWkURGDpFzEULI8YFIA5DzMCypzJ1kcBUoUJTAVAR16T1fb1uj3kyuYHfTJNC4xIzElPAxCyv6jIIwxAGa89_KvlDTaWqPKrDXVUZhLBjjrt8_c9lm_fdZv7_jxlT-LulOmUDtzujjxy_zPPxcH9BPVfoi0</recordid><startdate>20160101</startdate><enddate>20160101</enddate><creator>Stepien, Lukas</creator><creator>Roch, Aljoscha</creator><creator>Schlaier, Sarah</creator><creator>Dani, Ines</creator><creator>Kiriy, Anton</creator><creator>Simon, Frank</creator><creator>Lukowicz, Marian v.</creator><creator>Leyens, Christoph</creator><general>De Gruyter</general><general>Walter de Gruyter GmbH</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope></search><sort><creationdate>20160101</creationdate><title>Investigation of the Thermoelectric Power Factor of KOH-Treated PEDOT:PSS Dispersions for Printing Applications</title><author>Stepien, Lukas ; 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It is concluded that addition of base derives a dedoping of the PEDOT chain and increase Seebeck coefficient from 15 µV/K to 90 µV/K. Supportive UV-Vis-NIR spectroscopy was used for tracking the doping level of the polymer. A surface morphology study of the dedoped PEDOT:PSS films was monitored by SEM. It was shown that if KOH is used in excess with respect to the acid component of PEDOT:PSS dispersions, it segregates at the surface forming crystallites. They, however could be easily removed by methanol rinsing without destroying the sample integrity. After material modification, a dispenser-printed polymer unileg-TEG with 61 unicouples was fabricated by printing. The TEG in form of 253 mm-long stripe shows a flexible behavior. At 90 K temperature difference a resulting power output of ~ 100 nW could be measured. 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| subjects | base Conducting polymers Crystallites de-doping Dispersions flexible intrinsically conducting polymer PEDOT:PSS pH value Polymers Power factor printing Seebeck effect thermoelectric generator |
| title | Investigation of the Thermoelectric Power Factor of KOH-Treated PEDOT:PSS Dispersions for Printing Applications |
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