Radical polymeric p-doping and grain modulation for stable, efficient perovskite solar modules

• 成果类型: Article
• 署名作者: You, Shuai; Zeng, Haipeng; Liu, Yuhang; Han, Bing; Li, Min; Li, Lin; Zheng, Xin; Guo, Rui; Luo, Long; Li, Zhe; Zhang, Chi; Liu, Ranran; Zhao, Yang; Zhang, Shujing; Peng, Qi; Wang, Ti; Chen, Qi; Eickemeyer, Felix T.; Carlsen, Brian; Zakeeruddin, Shaik M.; Mai, Liqiang; Rong, Yaoguang; Gratzel, Michael; Li, Xiong
• 署名单位: Huazhong University of Science & Technology; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Southern University of Science & Technology; Wuhan University; Wuhan University; Chinese Academy of Sciences; Suzhou Institute of Nano-Tech & Nano-Bionics, CAS; Wuhan University of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11725
• DOI: 10.1126/science.add8786
• 发表日期: 2023-01-20
• 页码: 288-294
• 关键词: cells; performance; hysteresis; STABILITY; IMPACT; GROWTH; films

摘要

High-quality perovskite light harvesters and robust organic hole extraction layers are essential for achieving high-performing perovskite solar cells (PSCs). We introduce a phosphonic acid???functionalized fullerene derivative in mixed-cation perovskites as a grain boundary modulator to consolidate the crystal structure, which enhances the tolerance of the film against illumination, heat, and moisture. We also developed a redox-active radical polymer, poly(oxoammonium salt), that can effectively p-dope the hole-transporting material by hole injection and that also mitigates lithium ion diffusion. Power conversion efficiencies of 23.5% for 1-square-centimeter mixed???cation-anion PSCs and 21.4% for 17.1-square-centimeter minimodules were achieved. The PSCs retained 95.5% of their initial efficiencies after 3265 hours at maximum power point tracking under continuous 1-sun illumination at 70?? ?? 5??C.