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Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure
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Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure
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Journal Article
Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure
2012
Overview
Polymer-fullerene bulk heterojunction solar cells (PSCs) are currently attracting a great deal of attention and gaining increasing importance, having already shown great promise as renewable, lightweight and low-cost energy sources
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,
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,
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,
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. Recently, the power-conversion efficiency of state-of-the-art PSCs has exceeded 8% in the scientific literature
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. However, to find viable applications for this emerging photovoltaic technology, further enhancements in the efficiency towards 10% (the threshold for commercial applications) are urgently required
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. Here, we demonstrate highly efficient PSCs with a certified efficiency of 9.2% using an inverted structure, which simultaneously offers ohmic contact for photogenerated charge-carrier collection and allows optimum photon harvest in the device. Because of the ease of use and drastic boost in efficiency provided by this device structure, this discovery could find use in fully exploiting the potential of various material systems, and also open up new opportunities to improve PSCs with a view to achieving an efficiency of 10%.
Polymer solar cells are lightweight and may represent a low-cost source of energy, although efficiency still prohibits many practical applications. Here researchers demonstrate polymer solar cells with a certified efficiency of 9.2%. This is achieved by employing an inverted structure that aids photogenerated charge-carrier collection and photon harvesting.
Publisher
Nature Publishing Group UK,Nature Publishing Group
