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Overcoming Moisture...
Overcoming Moisture-Induced Degradation in Organic Solar Cells
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- Wachsmuth, Josua (författare)
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
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- Distler, Andreas (författare)
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
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- Deribew, Dargie (författare)
- Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013)
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- Salvador, Michael (författare)
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany; King Abdullah University of Science and Technology (KAUST), Saudi Arabia
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- Brabec, Christoph J. (författare)
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany; Helmholtz-Institute Erlangen-Nürnberg (HI ERN), Germany
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- Egelhaaf, Hans-Joachim (författare)
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany; Helmholtz-Institute Erlangen-Nürnberg (HI ERN), Germany
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(creator_code:org_t)
- John Wiley & Sons, 2023
- 2023
- Engelska.
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Ingår i: Advanced Engineering Materials. - : John Wiley & Sons. - 1438-1656 .- 1527-2648. ; , s. 1-7
- Relaterad länk:
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https://doi.org/10.1...
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https://kau.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Unencapsulated organic solar cells are prone to severe performance losses in the presence of moisture. Accelerated damp heat (85 °C/85% RH) studies are presented and it is shown that the hygroscopic hole-transporting PEDOT:PSS layer is the origin of device failure in the case of prototypical inverted solar cells. Complementary measurements unveil that under these conditions a decreased PEDOT:PSS work function along with areas of reduced electrical contact between active layer and hole-transport layer are the main factors for device degradation rather than a chemical reaction of water with the active layer. Replacements for PEDOT:PSS are explored and it is found that tungsten oxide (WO3) or phosphomolybdic acid (PMA)—materials that can be processed from benign solvents at room temperature—yields comparable performance as PEDOT:PSS and enhances the resilience of solar cells under damp heat. The stability trend follows the order PEDOT:PSS << WO3 < PMA, with PEDOT:PSS-based devices failing after few minutes, while PMA-based devices remain nearly pristine over several hours. PMA is thus proposed as a robust, solution-processable hole extraction layer that can act as a one to one replacement of PEDOT:PSS to achieve organic solar cells with significantly improved longevity.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Conducting polymers
- Hole mobility
- Moisture
- Organic solar cells
- Solar power generation
- %moisture; Active Layer; Cell/B.E
- Damp heat
- Degradation and stability
- Induced degradation
- Organic photovoltaics
- PEDOT/PSS
- Phosphomolybdic acid
- Solution-processed
- Tungsten compounds
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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