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The solubility of pristine fullerenes can be enhanced by mixing C60 and C70 due to the associated increase in configurational entropy. This “entropic dissolution” allows the preparation of field‐effect transistors with an electron mobility of 1 cm2 V−1 s−1 and polymer solar cells with a highly reproducible power‐conversion efficiency of 6%, as well as a thermally stable active layer.
C. Müller and co‐workers demonstrate on page 7325 that the solubility of pristine fullerenes can be enhanced by mixing C60 and C70 due to the associated increase in configurational entropy. This “entropic dissolution” is used to prepare field‐effect transistors and polymer solar cells. The front‐cover image is an artistic rendition of the dissolution of fullerenes in an organic solvent.
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