由具有氢键间隔物的聚合物供体实现的本征可拉伸、高效有机太阳能电池,Advanced Materials

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由具有氢键间隔物的聚合物供体实现的本征可拉伸、高效有机太阳能电池
Advanced Materials ( IF 27.4 ) Pub Date : 2022-09-25 , DOI: 10.1002/adma.202207544
Jin-Woo Lee ₁ , Soodeok Seo ₁ , Sun-Woo Lee ₂ , Geon-U Kim ₁ , Seungseok Han ₃ , Tan Ngoc-Lan Phan ₁ , Seungjin Lee ₁ , Sheng Li ₁ , Taek-Soo Kim ₂ , Jung-Yong Lee ₃ , Bumjoon J Kim ₁

Affiliation

本征可拉伸有机太阳能电池 (IS-OSC) 由所有可拉伸层组成，作为可穿戴电子产品的未来电源而备受关注。然而，由于为高电学和光学性能而设计的刚性分子结构，大多数用于 OSC 的有效活性层在机械上很脆。在这里，一系列新的聚合物供体（P _D s，PhAm X）具有基于苯基酰胺（N ¹，N ³ -双（（5-溴噻吩-2-基）甲基）间苯二甲酰胺，PhAm）的柔性间隔基（FS）诱导氢键（H-键合）相互作用被开发出来。这些 P _Ds 使 IS-OSC 具有 12.73% 的高功率转换效率 (PCE) 和出色的拉伸性（PCE 在 32% 应变下保持 >80% 的初始值），代表了迄今为止报道的 IS-OSC 中的最佳性能。基于 PhAm 的 FS 的加入增强了 P _D的分子排序以及它们与 Y7 受体的相互作用，同时增强了机械拉伸性和电学性能。还发现，在刚性 OSC 中，与参考 PM6:Y7 混合物相比，PhAm5:Y7 混合物实现了 17.5% 的高得多的 PCE。PhAm-FS 接头对 OSC 的机械和光伏特性的影响得到了彻底研究。

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Intrinsically Stretchable, Highly Efficient Organic Solar Cells Enabled by Polymer Donors Featuring Hydrogen-Bonding Spacers

Intrinsically stretchable organic solar cells (IS-OSCs), consisting of all stretchable layers, are attracting significant attention as a future power source for wearable electronics. However, most of the efficient active layers for OSCs are mechanically brittle due to their rigid molecular structures designed for high electrical and optical properties. Here, a series of new polymer donors (P_Ds, PhAmX) featuring phenyl amide (N¹,N³-bis((5-bromothiophen-2-yl)methyl)isophthalamide, PhAm)-based flexible spacer (FS) inducing hydrogen-bonding (H-bonding) interactions is developed. These P_Ds enable IS-OSCs with a high power conversion efficiency (PCE) of 12.73% and excellent stretchability (PCE retention of >80% of the initial value at 32% strain), representing the best performances among the reported IS-OSCs to date. The incorporation of PhAm-based FS enhances the molecular ordering of P_Ds as well as their interactions with a Y7 acceptor, enhancing the mechanical stretchability and electrical properties simultaneously. It is also found that in rigid OSCs, the PhAm5:Y7 blend achieves a much higher PCE of 17.5% compared to that of the reference PM6:Y7 blend. The impact of the PhAm-FS linker on the mechanical and photovoltaic properties of OSCs is thoroughly investigated.

更新日期：2022-09-25

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