Although several donor polymers have been synthesized for use in nonfullerene organic solar cells (NFOSCs), the number of efficient π‐conjugated donor polymers compatible with nonhalogenated solvent‐processed thick active layer NFOSCs is limited. Two wide‐bandgap π‐conjugated donor polymers functionalized with a siloxane side chain, P1 (chlorine‐free) and P2 (chlorinated), are designed and synthesized. The siloxane‐functionalized side chains and/or Cl π‐conjugated donor polymers increase the absorption coefficients, reduce the energy losses, increase the charge‐carrier mobility, and suppress the bimolecular recombination, which are beneficial to achieve high‐performance thick‐film ternary NFOSCs. Toluene‐processed devices based on P2:IT‐4F:BTP‐4Cl, and P2:IT‐4F:BTP‐4F exhibit high power conversion efficiencies (PCEs) of 13.25% and 11.02% with fill factors (FFs) of 70.03% and 71.60%, respectively. A P2:IT‐4F binary NFOSC exhibits a PCE of 10.38% with an FF of 69.78%, lower than that of the ternary NFOSC. The ternary device PCE of 13.25% is achieved using a 300 nm‐thick active layer, indicating that the siloxane‐functionalized side‐chain π‐conjugated polymer easily controls the bulk heterojunction blend film thickness of the NFOSC. The findings may potentially aid the development of nonhalogenated solvent‐processed thick‐film ternary NFOSCs that can satisfy future production requirements.

中文翻译：

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非卤代溶剂处理的厚膜三元非富勒烯有机太阳能电池，通过新型宽带隙聚合物实现了功率转换效率> 13％

尽管已经合成了几种供体聚合物用于非富勒烯有机太阳能电池（NFOSC），但与非卤代溶剂处理的厚活性层NFOSC兼容的高效π共轭供体聚合物的数量有限。设计并合成了两种带有硅氧烷侧链功能化的宽带隙π共轭给体聚合物P1（无氯）和P2（氯化）。硅氧烷官能化的侧链和/或Clπ共轭的给体聚合物可提高吸收系数，减少能量损失，提高电荷载流子迁移率并抑制双分子重组，这对于实现高性能厚膜三元体系是有利的NFOSC。基于P2：IT‐4F：BTP‐4Cl和P2：IT‐4F：BTP‐4F的甲苯处理设备显示出13.25％和11.的高功率转换效率（PCE）。02％，填充因子（FFs）分别为70.03％和71.60％。P2：IT-4F二进制NFOSC的PCE值为10.38％，FF为69.78％，低于三元NFOSC的PCE。使用300 nm厚的活性层可实现13.25％的三元器件PCE，表明硅氧烷官能化的侧链π共轭聚合物可轻松控制NFOSC的本体异质结共混物膜厚度。这些发现可能有助于开发可满足未来生产要求的非卤代溶剂处理厚膜三元NFOSC。表明硅氧烷官能化的侧链π共轭聚合物很容易控制NFOSC的本体异质结共混物膜的厚度。这些发现可能有助于开发可满足未来生产要求的非卤代溶剂处理厚膜三元NFOSC。表明硅氧烷官能化的侧链π共轭聚合物很容易控制NFOSC的本体异质结共混物膜的厚度。这些发现可能有助于开发可满足未来生产要求的非卤代溶剂处理厚膜三元NFOSC。