Study of organic photovoltaics by localized concentrated sunlight: Towards optimization of charge collection in large-area solar cells

Large-area organic solar cells are known to suffer from a major efficiency decrease which originates from the combination of a voltage drop across the front electrode and the voltage-dependent photocurrent. In this letter, we demonstrate this efficiency loss on large area, indium tin oxide free cell...

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Bibliographic Details
Published in:Applied physics letters 2011-10, Vol.99 (17), p.173305-173305-3
Main Authors: Manor, Assaf, Katz, Eugene A., Andriessen, Ronn, Galagan, Yulia
Format: Article
Language:English
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Summary:Large-area organic solar cells are known to suffer from a major efficiency decrease which originates from the combination of a voltage drop across the front electrode and the voltage-dependent photocurrent. In this letter, we demonstrate this efficiency loss on large area, indium tin oxide free cells with a hexagonal current collecting front grid, by measurements of light intensity dependence of the cell performance. The results show a major difference in the cell performance measured under localized and uniform illuminations. Subsequently, we demonstrate ways in which the current collecting efficiency could be raised.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3656276