Dependence on material choice of degradation of organic solar cells following exposure to humid air |
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| Authors: | Tom S. Glen Nicholas W. Scarratt Hunan Yi Ahmed Iraqi Tao Wang James Kingsley Alastair R. Buckley David G. Lidzey Athene M. Donald |
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| Affiliation: | 1. Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge, CB3 0HE United Kingdom;2. Department of Physics and Astronomy, Hicks Building, University of Sheffield, Hounsfield Road, Sheffield, S3 7RH United Kingdom;3. Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, S3 7HF United Kingdom;4. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070 China;5. Kroto Innovation Centre, Ossila Limited, Broad Lane, Sheffield, S3 7HQ United Kingdom |
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| Abstract: | Electron microscopy has been used to study the degradation of organic solar cells when exposed to humid air. Devices with various different combinations of commonly used organic solar cell hole transport layers and cathode materials have been investigated. In this way the ingress of water and the effect it has on devices could be studied. It was found that calcium and aluminum in the cathode both react with water, causing voids and delamination within the device. The use of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) was found to increase the degradation by easing water ingress into the device. Replacing these materials removed these degradation features. © 2015 The Authors. Journal of Polymer Science Part B: Polymer Physics published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 216–224 |
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| Keywords: | degradation humidity organic photovoltaics TEM water |
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