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

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4 Author(s)
Manor, Assaf ; Department of Solar Energy and Environmental Physics, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boker Campus 84990, Israel ; Katz, Eugene A. ; Andriessen, Ronn ; Galagan, Yulia

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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.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 17 )

Date of Publication:

Oct 2011

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