Metal-Organic Framework Nanosheets as Templates to Enhance Performance in Semi-Crystalline Organic Photovoltaic Cells.
Metal-Organic Framework Nanosheets as Templates to Enhance Performance in Semi-Crystalline Organic Photovoltaic Cells.
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金属-有机骨架纳米片作为模板提高半结晶有机光伏电池的性能。
DOI：
10.1002/advs.202200366
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发表时间：
2022-07
期刊：
影响因子：
15.1
通讯作者：
Foster, Jonathan A.
中科院分区：
文献类型：
--
作者：
Sasitharan, Kezia;Kilbride, Rachel C.;Spooner, Emma L. K.;Clark, Jenny;Iraqi, Ahmed;Lidzey, David G.;Foster, Jonathan A.
关键词：
优化有机光伏（OPV）器件中组件的取向、结晶度和畴尺寸是最大化其性能的关键。在这里，一个广泛适用的方法，用于提高本体异质结OPV器件的形态，使用金属有机纳米片（MONs）作为添加剂被证明。结果表明，将卟啉基MON添加到具有完全无定形供体聚合物的器件中导致性能的小幅改善，这归因于纳米片引起的光吸收增加。然而，基于半结晶聚合物的器件在功率转换效率（PCE）方面显示出显着的改善，在某些情况下与没有纳米片的参考器件相比增加了一倍以上。特别地，这种方法导致了具有12.3%的PCE的PffBT 4 T2 ODMON-PCBM器件的开发，据作者所知，这是迄今为止文献中报道的性能最高的基于富勒烯的OPV器件。对这些器件的详细分析表明，纳米片的存在导致膜中更高比例的面向取向的聚合物晶体。因此，这些结果证明了这种高度可调的二维纳米材料作为添加剂用于增强半结晶有机电子器件的形态并因此增强其性能的潜力。基于卟啉的金属有机框架纳米片被添加到一系列有机光伏器件中，从而产生迄今为止报道的最高性能的基于富勒烯的器件。分析表明，对于基于半结晶聚合物的器件，纳米片增加了膜中面向取向的聚合物晶体的分数，从而增强了吸收和电荷传输。
Optimizing the orientation, crystallinity, and domain size of components within organic photovoltaic (OPV) devices is key to maximizing their performance. Here a broadly applicable approach for enhancing the morphology of bulk heterojunction OPV devices using metal–organic nanosheets (MONs) as additives is demonstrated. It is shown that addition of porphyrin‐based MONs to devices with fully amorphous donor polymers lead to small improvements in performance attributed to increased light absorption due to nanosheets. However, devices based on semi‐crystalline polymers show remarkable improvements in power conversion efficiency (PCE), more than doubling in some cases compared to reference devices without nanosheets. In particular, this approach led to the development of PffBT4T2OD‐MON‐PCBM device with a PCE of 12.3%, which to the authors’ knowledge is the highest performing fullerene based OPV device reported in literature to date. Detailed analysis of these devices shows that the presence of the nanosheets results in a higher fraction of face‐on oriented polymer crystals in the films. These results therefore demonstrate the potential of this highly tunable class of two‐dimensional nanomaterials as additives for enhancing the morphology, and therefore performance, of semi‐crystalline organic electronic devices. Porphyrin based metal‐organic framework nanosheets are added to a range of organic photovoltaic devices resulting in the highest performing fullerene based devices reported to date. Analysis shows that for devices based on semi‐crystalline polymers, the nanosheets increase the fraction of face‐on oriented polymer crystals in the films leading to enhanced absorbance and charge transport.
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