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To elucidate the optimal bulk heterojunction (BHJ) film for high-performance organic photovoltaics, structural control of BHJ films based on small molecules is one of the great challenges. A homogeneous BHJ structure based on oligothiophene and fullerene has been fabricated by means of terminal modification using the sterically bulky t-butyl group. However, the suppression of interaction among the...
Organic photovoltaic solar cells based on oligothiophene and fullerene have been investigated intensively. Until now, the morphologies of bulk heterojunction (BHJ) structures based on oligothiophene and fullerene have been difficult to control because the oligothiophene molecules have lacked substituent groups and therefore have interacted strongly with one another to the point of aggregating into...
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