三氯苯甲酸的原位自组装使有机光伏发电效率接近 19%,Advanced Functional Materials

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三氯苯甲酸的原位自组装使有机光伏发电效率接近 19%
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-21 , DOI: 10.1002/adfm.202313594
Wei He ₁ , Hongxiang Li ₁ , Ruijie Ma ₂ , Xue Yan ₁ , Hailin Yu ₁ , Yingyue Hu ₁ , Dingqin Hu ₃ , Jiaqiang Qin ₁ , Ningbo Cui ₄ , Jiayu Wang ₁ , Shirong Lu ₅ , Cenqi Yan ₁ , Gang Li ₂ , Pei Cheng ₁

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有机光伏 (OPV) 未来的工业化要求 OPV 的加工更加节能和简化。目前，通常仅使用MoO ₃和PEDOT:PSS作为阳极界面层(AIL)。 MoO ₃的加工通常涉及具有严格厚度要求的真空热蒸发。 PEDOT:PSS 需要在超过 100 °C 的温度下进行单独加工和热退火，以消除水分。这项工作使用 3,4,5-三氯苯甲酸 (3CBA) 作为 AIL 材料。 3CBA 相对于 PEDOT:PSS 和 MoO ₃的明显优势是 3CBA 的原位自组装消除了单独溶液处理、热蒸发或热退火的需要。值得注意的是，与使用 PEDOT:PSS 的 OPV 器件 (17.7%) 相比，包含 PM6、BTP-eC9 和 3CBA AIL 的 OPV 器件表现出 18.2% 的优越效率。通过使用非卤化溶剂邻二甲苯来满足工业化要求，该器件实现了 18.8% 的优异效率，这是具有原位自组装界面层的器件中报道的最高值。此外，由于 3CBA AIL 的吸收较弱，具有 3CBA 的半透明器件比 PEDOT: PSS 器件表现出更高的 PCE 和 AVT 值（13.1% 和 25.7%）。这项工作通过简化 AIL 处理，为 OPV 的高通量生产做出了重大贡献。

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In Situ Self-Assembly of Trichlorobenzoic Acid Enabling Organic Photovoltaics with Approaching 19% Efficiency

Future industrialization of organic photovoltaics (OPVs) requires OPVs’ processing to be more energy-efficient and streamlined. Currently, only MoO₃ and PEDOT:PSS are commonly used as the anode interface layer (AIL). The processing of MoO₃ typically involves vacuum thermal evaporation with stringent thickness requirements. PEDOT:PSS necessitates separate processing and thermal annealing at temperatures exceeding 100 °C to eliminate moisture. This work utilized 3,4,5-trichlorobenzoic acid (3CBA) as the AIL material. The distinct advantage of 3CBA over PEDOT:PSS and MoO₃ is the in situ self-assembly of 3CBA eliminates the need for separate solution processing, thermal evaporation, or thermal annealing. Remarkably, OPV devices incorporating PM6, BTP-eC9, and the 3CBA AIL exhibited a superior efficiency of 18.2% compared to those with PEDOT:PSS (17.7%). By using nonhalogenated solvent, o-xylene, to meet industrialization requirements, the devices achieved an exceptional efficiency of 18.8%, the highest reported value among devices with in situ self-assembled interface layers. Furthermore, semi-transparent devices with 3CBA displayed higher PCE and AVT values (13.1% and 25.7%) than their PEDOT: PSS counterparts, due to the weak absorption of the 3CBA AIL. This work contributes significantly to the high-throughput production of OPVs by streamlining the AIL processing.

更新日期：2023-12-21

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