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Precise, Self-Limited Epitaxy of Ultrathin Organic Semiconductors and Heterojunctions Tailored by van der Waals Interactions

机译:Van der Waals相互作用量身定制的超薄有机半导体的精确自限外延和异质结

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摘要

Precise assembly of semiconductor heterojunctions is the key to realize many optoelectronic devices. By exploiting the strong and tunable van der Waals (vdW) forces between graphene and organic small molecules, we demonstrate layer-by-layer epitaxy of ultrathin organic semiconductors and heterostructures with unprecedented precision with well-defined number of layers and self-limited characteristics. We further demonstrate organic p-n heterojunctions with molecularly flat interface, which exhibit excellent rectifying behavior and photovoltaic responses. The self-limited organic molecular beam epitaxy (SLOMBE) is generically applicable for many layered small-molecule semiconductors and, may lead to advanced organic optoelectronic devices beyond bulk heterojunctions.
机译:半导体异质结的精确组装是实现许多光电器件的关键。通过利用石墨烯与有机小分子之间的强大且可调的范德华(vdW)力,我们以前所未有的精度,定义的层数和自限性特性证明了超薄有机半导体和异质结构的逐层外延。我们进一步展示了具有分子平面界面的有机p-n异质结,表现出出色的整流性能和光伏响应。自限有机分子束外延(SLOMBE)通常适用于许多层状小分子半导体,并且可能导致超出体异质结的先进有机光电器件。

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