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Laminated fabrication of polymeric photovoltaic diodes

机译：聚合物光伏二极管的层压制造

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摘要

Photoexcited electron transfer between donor and acceptor molecular semiconductors provides a method of efficient charge generation following photoabsorption, which can be exploited in photovoltaic diodes. But efficient charge separation and transport to collection electrodes is problematic, because the absorbed photons must be close to the donor-acceptor heterojunction, while at the same time good connectivity of the donor and acceptor materials to their respective electrodes is required. Mixtures of acceptor and donor semiconducting polymers (or macromolecules) can provide phase-separated structures which go some way to meeting this requirement, providing high photo-conductive efficiencies. Here we describe two-layer polymer diodes, fabricated by a lamination technique followed by controlled annealing. The resulting structures provide good connectivity to the collection electrodes, and we achieve a short-circuit photovoltaic quantum efficiency of up to 29% at optimum wavelength, and an overall power conversion efficiency of 1.9% under a simulated solar spectrum. Given the convenience of polymer processing, these results indicate a promising avenue towards practical applications for such devices.
机译：供体和受体分子半导体之间的光激发电子转移提供了一种在光吸收之后有效产生电荷的方法，该方法可用于光电二极管。但是有效的电荷分离和传输到收集电极是有问题的，因为吸收的光子必须靠近施主-受主异质结，而同时要求施主和受主材料与其各自的电极良好的连通性。受体和供体半导体聚合物（或大分子）的混合物可以提供相分离的结构，该结构可以满足该要求，从而提供高的光电导效率。在这里，我们描述了两层聚合物二极管，它是通过层压技术制造，然后进行受控退火。所得的结构提供了与收集电极的良好连通性，并且在最佳波长下，我们实现了高达29％的短路光伏量子效率，在模拟的太阳光谱下，总功率转换效率为1.9％。鉴于聚合物加工的便利性，这些结果表明了此类设备在实际应用中的有希望的途径。

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