Development of High Efficient Organic Photovoltaics Based on Unique pi-Conjugated Molecules

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Explanation of novel electron donor and acceptor that self-assembly form a heterojunction with a wide interface of hole and electron transporting nanoscale domains is important for the realization of high-efficient thin-film organic solar cells. Through the present work, we succeeded in the development of high performance organic semiconductors with unique pi-conjugated systems. Furthermore, we serendipitously discovered that a novel planar molecule with high electron accepting property is able to adopt a face-on orientation on substrates favorable for carrier transportation. Based on this finding, we developed a novel photomechanical material that can convert light energy into an electrical output.