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Facile Monitoring o...
Facile Monitoring of Fullerene Crystallization in Polymer Solar Cell Blends by UV–vis Spectroscopy
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- Lindqvist, Camilla, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wang, Ergang, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Mats, 1966 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Müller, Christian, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2014-02-05
- 2014
- Engelska.
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Ingår i: Macromolecular Chemistry and Physics. - : Wiley. - 1022-1352 .- 1521-3935. ; 215:6, s. 530-535
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
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- A simple technique is demonstrated based on UV–vis spectroscopy that permits the onset of fullerene crystallization to be monitored in polymer:fullerene bulk-heterojunction blends. The growth of fullerene crystals only occurs during thermal annealing above the glass transition temperature (Tg) of the blend. Light scattering due to the presence of micrometer-sized fullerene crystals reduces the apparent transmittance, which can serve as a clear indicator for the upper limit of the Tg. This principle is used to deduce this critical parameter for two high-performance photovoltaic blends that are based on a thiophene–quinoxaline and a thiophene–isoindigo copolymer, respectively. High Tgs of 115 and 145 °C promise good thermal stability.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
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