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Nonfullerene/Fullerene Acceptor Blend with a Tunable Energy State for High-Performance Ternary Organic Solar Cells

机译:非氟联/富勒烯受体混合可调谐能量状态,适用于高性能三元有机太阳能电池

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Ternary blending is an effective strategy for broadening the absorption range of the active layer in bulk heterojunction polymer solar cells and for constructing an efficient cascade energy landscape at the donor/acceptor interface to achieve high efficiencies. In this study, we report efficient ternary blend solar cells containing an acceptor alloy consisting of the indacenodithiophene-based nonfullerene material, IDT2BR, and the fullerene material, phenyl-C-71-butyric acid methyl ester (PC71BM). The IDT2BR materials mix fully with PC71BM materials, and the energy state of this phase can be tuned by varying the blending ratio. We performed photoluminescence and external quantum efficiency studies and found that the ternary charge cascade structure efficiently transfers the photogenerated charges from the polymer to IDT2BR and finally to PC71BM materials. Ternary blend devices containing the IDT2BR:PC71BM acceptor blend and various types of donor polymers were found to exhibit power conversion efficiencies (PCEs) improved by more than 10% over the PCEs of the binary blend devices.
机译:三元共混是一种有效的策略,用于在散装异质结聚合物太阳能电池中扩大有源层的吸收范围,并在供体/受体界面构建有效的级联能量景观,以实现高效率。在这项研究中,我们报告了含有由基于茚环丁基噻吩的非丙烯烯材料,IDT2BR和富勒烯材料,苯基-C-71-丁酸甲酯(PC71BM)组成的受体合金的高分子混合物太阳能电池。 IDT2BR材料完全与PC71BM材料混合,并且可以通过改变混合比来调谐该阶段的能量状态。我们进行了光致发光和外部量子效率研究,发现三元电荷级联结构有效地将来自聚合物的光发生电荷转移到IDT2BR中,并最终到PC71BM材料。含有IDT2BR:PC71BM受体混合物和各种类型供体聚合物的三元混合物装置在二元共混装置的PCE上显示出功率转化效率(PCE)提高了10%以上。

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