近日，美国北卡罗来纳大学查珀尔希尔校区的Jinsong Huang及其研究团队取得一项新进展。经过不懈努力，他们发现多官能基恩替诺特能够提高柔性钙钛矿太阳能电池和微型组件的机械鲁棒性和效率。相关研究成果已于2024年1月18日在国际知名学术期刊《自然—光子学》上发表。
该研究团队将有机分子恩替诺特加入到多孔萃取材料聚(双(4-苯基)(2,4,6-三甲基苯基)胺中，利用恩替诺特的多官能基与钙钛矿、聚(双(4-苯基)(2,4,6-三甲基苯基)胺和氧化铟锡的相互作用，增强了钙钛矿与基质之间的粘附性。此外，由于钛酸盐能够调节钙钛矿的结晶，从而降低了钙钛矿薄膜底部的空隙密度。研究人员展示了反式小面积柔性钙钛矿太阳能电池，其功率转换效率高达23.4%。
面积为9cm2的柔性钙钛矿微型组件实现了约19.0%的认证孔径效率。经过优化的未封装柔性微型模块在经过5000次弯曲循环后仍能保持84%的初始效率，并在光照浸泡750小时后仍能保持90%的初始功率转换效率。
据悉，柔性钙钛矿太阳能电池因其柔软性和高功率重量比而备受关注。然而，由于界面附着力较弱以及柔性衬底的大变形，导致钙钛矿与衬底之间的界面质量较差，从而极大地制约了柔性钙钛矿太阳能电池的性能表现。
附：英文原文
Title: Multifunctional entinostat enhances the mechanical robustness and efficiency of flexible perovskite solar cells and minimodules
Author: Xu, Wenzhan, Chen, Bo, Zhang, Zhao, Liu, Ye, Xian, Yeming, Wang, Xiaoming, Shi, Zhifang, Gu, Hangyu, Fei, Chengbin, Li, Nengxu, Uddin, Md Aslam, Zhang, Hengkai, Dou, Letian, Yan, Yanfa, Huang, Jinsong
Issue&Volume: 2024-01-18
Abstract: Flexible perovskite solar cells have attracted substantial attention owing to their promises for soft and high power–weight compatibility. However, the inferior quality of the buried perovskite–substrate interface due to low interfacial adhesion and large deformation of flexible substrates have greatly limited the performance of flexible perovskite solar cells. Here we add the organic molecule entinostat into the hole extraction material poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) to enhance adhesion at the perovskite–substrate interface using the interaction of entinostat with perovskites, poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) and indium tin oxide through its multiple functional groups. In addition, entinostat reduces the density of voids at the bottom of the perovskite film owing to its capability to tune the crystallization of perovskites. We demonstrate inverted small-area flexible perovskite solar cells with a power conversion efficiency of 23.4%. Flexible perovskite minimodules with an area of 9cm2 achieve a certified aperture efficiency of ~19.0%. The optimized unencapsulated flexible minimodule retains 84% of its initial efficiency after 5,000 bending cycles and 90% of the initial power conversion efficiency after light soaking for >750h.
DOI: 10.1038/s41566-023-01373-z
Source: https://www.nature.com/articles/s41566-023-01373-z