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Proper percolation of charges in solar cells is possible with the self-assembled nanostructure of a block-copolymer film (see the TEM cross section of a solar cell). A photovoltaic device made from such a block copolymer exhibits a ten-times higher short circuit current and a considerably larger photovoltage than its polymer-blend analogue.
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Lindner et al. (2006) studied this question.
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