用于高性能倒置钙钛矿太阳能电池的具有有序亲水性双层的自组装材料。
Self-assembled materials with an ordered hydrophilic bilayer for high performance inverted Perovskite solar cells.
作者信息
Qu Geping, Zhang Letian, Qiao Ying, Gong Shaokuan, Ding Yuanjia, Tao Yuli, Cai Siyuan, Chang Xiao-Yong, Chen Qian, Xie Pengfei, Feng Junyuan, Gao Changqin, Li Guopeng, Xiao Hui, Wang Fei, Hu Hanlin, Yang Jie, Chen Shi, Jen Alex K-Y, Chen Xihan, Xu Zong-Xiang
机构信息
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, China.
Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China.
出版信息
Nat Commun. 2025 Jan 2;16(1):86. doi: 10.1038/s41467-024-55523-0.
While self-assembled material based inverted perovskite solar cells have surpassed power conversion efficiencies of 26%, enhancing their performance in large-area configurations remains a significant challenge. In this work, we report a self-assembled material based hole-selective layer 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid, with a π-expanded conjugation. The enhanced intermolecular π-π interactions facilitate the self-assembly of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid molecules to form an ordered bilayer with a hydrophilic surface, which passivates the buried perovskite interface defect and enables high-quality and large-area perovskite preparation, while simultaneously enhancing interfacial charge extraction and transport. The certified efficiency of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid based small-area (0.0715 cm) device is 26.39% with high stability. Furthermore, a certified efficiency of 25.21% is achieved for a 99.12 mm large area device.
虽然基于自组装材料的倒置钙钛矿太阳能电池的功率转换效率已超过26%，但在大面积配置中提高其性能仍然是一项重大挑战。在这项工作中，我们报告了一种基于自组装材料的空穴选择性层4-(7H-二苯并[c,g]咔唑-7-基)苯基膦酸，具有扩展的π共轭。增强的分子间π-π相互作用促进了4-(7H-二苯并[c,g]咔唑-7-基)苯基膦酸分子的自组装，形成具有亲水性表面的有序双层，这钝化了埋入的钙钛矿界面缺陷，并实现了高质量和大面积的钙钛矿制备，同时增强了界面电荷提取和传输。基于4-(7H-二苯并[c,g]咔唑-7-基)苯基膦酸的小面积（0.0715 cm²）器件的认证效率为26.39%，具有高稳定性。此外，对于99.12 mm²的大面积器件，认证效率达到了25.21%。
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