Effect of a buffer layer, composition and annealing on the performance of a bulk heterojunction polythiophene/fullerene composite photovoltaic device |
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Authors: | Sukhbinder Rait Shipra Kashyap P.K. Bhatnagar P.C. Mathur Sandip K. Sengupta Jayant Kumar |
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Affiliation: | aMaterials Lab, Department of Electronic Science, University of Delhi South Campus, Benito Juarez Road, New Delhi 110021, India;bCenter of Advanced Materials, University of Massachusetts Lowell, Lowell, MA 01854, USA |
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Abstract: | Post-annealing of P3HT/C60-based plastic solar cells, composite ratio and, incorporation of a buffer layers at the ITO–polymer/fullerene composite interface and the polymer/fullerene composite–Al interface have shown significant improvement in the performance of the photovoltaic device, both in terms of open-circuit voltage and short-circuit current. The annealing temperature, time duration and P3HT/C60 composite ratios have been optimized for the best performance of typical ITO/PEDOT:PSS/P3HT:C60/LiF/Al solar cell. The C60 content is very crucial because it improves the photocurrent in the beginning but after a certain value it leads to decrease in absorption, thereby decreasing the photocurrent. |
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Keywords: | Polythiophene Fullerene Annealing Composition |
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