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Teaching old anchoring group new tricks: enabling low-cost, eco-friendly hole-transporting materials for efficient and stable perovskite solar cells
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-08-27 , DOI: 10.1021/jacs.0c06373
Yang Wang 1 , Qiaogan Liao 1, 2 , Jianhua Chen 3 , Wei Huang 3 , Xinming Zhuang 3 , Yumin Tang 1 , Bolin Li 1 , Xiyu Yao 1 , Xiyuan Feng 1 , Xianhe Zhang 1 , Mengyao Su 1 , Zhubing He 1 , Tobin J Marks 3 , Antonio Facchetti 3 , Xugang Guo 1
Affiliation  

As a key component in perovskite solar cells (PVSCs), hole-transporting materials (HTMs) have been extensively explored and studied. Aiming to meet the requirements for future commercialization of PVSCs, HTMs which can enable excellent device performance with low cost and eco-friendly processability are urgently needed, but rarely reported. In this work, a traditional anchoring group (2-cyanoacrylic acid) widely used in molecules for dye-sensitized solar cells is incorporated into donor-acceptor type HTMs to afford MPA-BT-CA, which enables effective regulation of the frontier molecular orbital energy levels, interfacial modification of ITO electrode, efficient defect passivation toward perovskite layer and more importantly alcohol solubility. Consequently, inverted PVSCs with this low-cost HTM exhibit excellent device performance with a remarkable power conversion efficiency (PCE) of 21.24% and good long-term stability in ambient condition. More encouragingly, when processing MPA-BT-CA films with green solvent ethanol, the corresponding PVSCs also deliver a substantial PCE as high as 20.52% with negligible hysteresis. Such molecular design of anchoring group based materials represent a great progress for developing efficient HTMs, which well combine the advantages of low cost, eco-friendly processability and high performance. We believe that such design strategy will pave a new path for the exploration of highly efficient HTMs applicable to commercialization of PVSCs.

中文翻译:

教授老锚组新技巧:为高效稳定的钙钛矿太阳能电池提供低成本、环保的空穴传输材料

作为钙钛矿太阳能电池 (PVSC) 的关键组件,空穴传输材料 (HTM) 已被广泛探索和研究。为了满足 PVSC 未来商业化的要求,迫切需要能够以低成本和环保加工性实现优异器件性能的 HTM,但鲜有报道。在这项工作中,广泛用于染料敏化太阳能电池分子中的传统锚定基团(2-氰基丙烯酸)被结合到供体-受体型 HTM 中以提供 MPA-BT-CA,从而能够有效调节前沿分子轨道能量水平、ITO 电极的界面改性、对钙钛矿层的有效缺陷钝化以及更重要的醇溶性。最后,具有这种低成本 HTM 的倒置 PVSC 具有出色的器件性能,具有 21.24% 的显着功率转换效率 (PCE) 和良好的环境条件下的长期稳定性。更令人鼓舞的是,当用绿色溶剂乙醇处理 MPA-BT-CA 薄膜时,相应的 PVSC 还提供高达 20.52% 的可观 PCE,滞后可忽略不计。这种基于锚定基团材料的分子设计代表了开发高效 HTM 的巨大进步,它很好地结合了低成本、环保可加工性和高性能的优点。我们相信这种设计策略将为探索适用于 PVSC 商业化的高效 HTM 铺平道路。当使用绿色溶剂乙醇处理 MPA-BT-CA 薄膜时,相应的 PVSC 还提供高达 20.52% 的可观 PCE,且滞后可忽略不计。这种基于锚定基团材料的分子设计代表了开发高效 HTM 的巨大进步,它很好地结合了低成本、环保可加工性和高性能的优点。我们相信这种设计策略将为探索适用于 PVSC 商业化的高效 HTM 铺平道路。当使用绿色溶剂乙醇处理 MPA-BT-CA 薄膜时,相应的 PVSC 还提供高达 20.52% 的可观 PCE,且滞后可忽略不计。这种基于锚定基团材料的分子设计代表了开发高效 HTM 的巨大进步,它很好地结合了低成本、环保可加工性和高性能的优点。我们相信这种设计策略将为探索适用于 PVSC 商业化的高效 HTM 铺平道路。环保加工性和高性能。我们相信这种设计策略将为探索适用于 PVSC 商业化的高效 HTM 铺平道路。环保加工性和高性能。我们相信这种设计策略将为探索适用于 PVSC 商业化的高效 HTM 铺平道路。
更新日期:2020-08-27
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