Enhancing Fullerene‐Based Solar Cell Lifetimes by Addition of a Fullerene Dumbbell |
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| Authors: | Dr. Bob C. Schroeder Dr. Zhe Li Michael A. Brady Dr. Gregório Couto Faria Dr. Raja Shahid Ashraf Dr. Christopher J. Takacs John S. Cowart Dr. Duc T. Duong Kar Ho Chiu Ching‐Hong Tan Dr. João T. Cabral Prof. Alberto Salleo Prof. Michael L. Chabinyc Prof. James R. Durrant Prof. Iain McCulloch |
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| Affiliation: | 1. Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ (UK);2. Materials Department, University of California Santa Barbara, Santa Barbara, California 93106 (USA);3. Department of Materials Science and Engineering, Stanford University, 476 Lomita Mall, Stanford, California 94305 (USA);4. S?o Carlos Physics Institute, University of S?o Paulo, PO.Box: 369, 13560‐970, S?o Carlos, SP (Brazil);5. Department of Chemical Engineering and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ (UK) |
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| Abstract: | Cost‐effective, solution‐processable organic photovoltaics (OPV) present an interesting alternative to inorganic silicon‐based solar cells. However, one of the major remaining challenges of OPV devices is their lack of long‐term operational stability, especially at elevated temperatures. The synthesis of a fullerene dumbbell and its use as an additive in the active layer of a PCDTBT:PCBM‐based OPV device is reported. The addition of only 20 % of this novel fullerene not only leads to improved device efficiencies, but more importantly also to a dramatic increase in morphological stability under simulated operating conditions. Dynamic secondary ion mass spectrometry (DSIMS) and TEM are used, amongst other techniques, to elucidate the origins of the improved morphological stability. |
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| Keywords: | fullerenes lifetime organic solar cells photovoltaics stability |
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