In order to realise the potential of organic photovoltaic devices (OPVs) to provide cheap, scalable access to renewable energy, it is necessary to improve their lifetime and cost of encapsulation. The aim of this work is to achieve these aims by blending the donor and acceptor with the commodity polymer, PMMA, to form a ternary blend device with enhanced lifetime. We find that ternary OPV devices prepared in this manner can have up to double the lifetime of the binary control devices to an extent that depends upon the PMMA morphology and the processing additives used. Further, we find that the initial performance of ternary OPVs may decrease (in the case of PTB7-based blends) or slightly increase (in the case of P3HT-based blends) when compared to their binary counterparts, which is hypothesised to be due to donor compatibility with the PMMA. These findings suggest that this approach can be employed in other OPV blend systems and give design rules to maximise the positive impact on device lifetime.

中文翻译：

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通过与 PMMA 混合实现的有机光伏二极管的延长寿命：形态和供体：受体组合的影响

为了实现有机光伏器件 (OPV) 提供廉价、可扩展的可再生能源的潜力，有必要提高其寿命和封装成本。这项工作的目的是通过将供体和受体与商品聚合物 PMMA 混合以形成具有更长寿命的三元混合器件来实现这些目标。我们发现以这种方式制备的三元 OPV 器件可以将二元控制器件的寿命延长一倍，这取决于 PMMA 形态和所使用的加工添加剂。此外，我们发现与二元对应物相比，三元 OPV 的初始性能可能会降低（在基于 PTB7 的混合物的情况下）或略微增加（在基于 P3HT 的混合物的情况下），这被假设是由于供体与 PMMA 的兼容性。