中科院青岛生物能源与过程研究所逄淑平团队报道了用于高效、稳定的钙钛矿的太阳能电池的羰基添加剂的分子偶极子工程。相关研究成果发表在2023年3月27日出版的《德国应用化学》。
羰基功能材料作为添加剂被广泛应用于降低钙钛矿膜的缺陷密度。然而，对羰基添加剂提高器件性能的机制仍缺乏全面的了解。
该文中，研究人员系统研究了羰基添加剂分子对钙钛矿膜中缺陷钝化的影响。经过全面的研究，结果证实了分子偶极在放大添加剂分子钝化效应方面的重要性。具有强分子偶极的添加剂具有提高钙钛矿太阳能电池（PSCs）效率和稳定性的优点。经过优化，PSCs的伴随效率为23.20%，在恶劣条件下可以保持长期稳定性。此外，大面积太阳能电池模块改性的DLBA为20.18%（14cm2）。
该项工作为高效羰基添加剂的选择和设计提供了重要参考。
附：英文原文
Title: Molecular Dipole Engineering of Carbonyl Additives for Efficient and Stable Perovskite Solar Cells
Author: Xiaoqing Jiang, Bingqian Zhang, Guangyue Yang, Zhongmin Zhou, Xin Guo, Fengshan Zhang, Shitao Yu, Shiwei Liu, Shuping Pang
Issue&Volume: 2023-03-27
Abstract: Carbonyl functional materials as additives are extensively applied to reduce the defects density of the perovskite film. However, there is still a lack of comprehensive understanding for the effect of carbonyl additives to improve device performance. In this work, we systematically study the effect of carbonyl additive molecules on the passivation of defects in perovskite films. After a comprehensive investigation, the results confirm the importance of molecular dipole in amplifying the passivation effect of additive molecules. The additive with strong molecular dipole possesses the advantages of enhancing the efficiency and stability of perovskite solar cells (PSCs). After optimization, the companion efficiency of PSCs is 23.20%, and it can maintain long-term stability under harsh conditions. Additionally, a large-area solar cell module-modified DLBA was 20.18% (14 cm2). This work provides an important reference for the selection and designing of efficient carbonyl additives.
DOI: 10.1002/anie.202302462
Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202302462
