Intrinsically-Stretchable, Efficient Organic Solar Cells Achieved by High-Molecular-Weight, Electro-Active Polymer Acceptor Additives,Advanced Energy Materials

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Intrinsically-Stretchable, Efficient Organic Solar Cells Achieved by High-Molecular-Weight, Electro-Active Polymer Acceptor Additives
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-06-09 , DOI: 10.1002/aenm.202200887
Jin‐Woo Lee ₁ , Geon‐U Kim ₁ , Dong Jun Kim ₂ , Yeonjee Jeon ₃ , Sheng Li ₁ , Taek‐Soo Kim ₂ , Jung‐Yong Lee ₃ , Bumjoon J. Kim ₁

Affiliation

Organic solar cells (OSCs) are promising wearable/stretchable power sources, but the development of high-performance intrinsically stretchable OSCs (IS-OSCs) has rarely been reported. Herein, IS-OSCs exhibiting high power conversion efficiencies (PCEs) (>12%) and excellent stretchability are developed by constructing efficient and mechanically robust active layers via the addition of a high-molecular weight polymer acceptor (P_A) to polymer donor:small-molecule acceptor blends. P_A addition significantly enhances the stretchability and PCEs of the blends as the long P_A chains function as molecular bridges between different domains, effectively dissipating mechanical stresses and improving charge transport. The IS-OSCs with 20 wt% P_A content exhibit a high PCE of 11.7% and excellent stretchability, retaining 84% of the initial PCE after 100 cycles of repetitive stretching/releasing at a 15% strain. To the best of the authors’ knowledge, the device represents the best IS-OSC performance reported to date in terms of PCE and stretchability, demonstrating the great potential of IS-OSCs as an efficient and wearable power generator.

中文翻译：

通过高分子量、电活性聚合物受体添加剂实现本征可拉伸、高效的有机太阳能电池

有机太阳能电池 (OSCs) 是有前途的可穿戴/可拉伸电源，但高性能本征可拉伸 OSCs (IS-OSCs) 的开发却鲜有报道。_{在此，通过向聚合物供体添加高分子量聚合物受体 (}PA ) 构建高效且机械坚固的活性层，开发了具有高功率转换效率 (PCE) (>12%) 和出色拉伸性的 IS-OSC ：小分子受体混合物。P _A添加显着提高了共混物的拉伸性和 PCE，因为长P _A链充当不同域之间的分子桥梁，有效地消散机械应力并改善电荷传输。具有 20 wt% P _A含量的 IS-OSCs 表现出 11.7% 的高 PCE 和优异的拉伸性，在 15% 应变下重复拉伸/释放 100 次循环后保持初始 PCE 的 84%。据作者所知，该设备代表了迄今为止在 PCE 和可拉伸性方面报道的最佳 IS-OSC 性能，展示了 IS-OSC 作为高效和可穿戴发电机的巨大潜力。

更新日期：2022-06-09

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