华中科技大学李红团队报道了稳定、高效钙钛矿太阳能组件的自由基聚合物p掺杂和晶粒调制。相关研究成果发表在2023年1月20日出版的国际知名学术期刊《科学》。

高质量钙钛矿光采集器和耐用的有机空穴提取层对于实现高性能钙钛矿太阳能电池（PSCs）至关重要。

研究人员在混合阳离子钙钛矿中引入膦酸官能化富勒烯衍生物作为晶界调节剂，以巩固晶体结构，并提高了膜对光照、热和湿气的耐受性。研究人员还开发了一种氧化还原活性自由基聚合物，聚（氧代铵盐），它可以通过空穴注入有效地对空穴传输材料进行p掺杂，还可以缓解锂离子扩散。1平方厘米混合阳离子-阴离子PSCs的功率转换效率为23.5%，17.1平方厘米最小模块的功率转换率为21.4%。在70°±5°C的连续1个标准太阳照射下，在最大功率点跟踪3265小时后，PSCs保持了95.5%的初始效率。

附：英文原文

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

Author: Shuai You, Haipeng Zeng, Yuhang Liu, Bing Han, Min Li, Lin Li, Xin Zheng, Rui Guo, Long Luo, Zhe Li, Chi Zhang, Ranran Liu, Yang Zhao, Shujing Zhang, Qi Peng, Ti Wang, Qi Chen, Felix T. Eickemeyer, Brian Carlsen, Shaik M. Zakeeruddin, Liqiang Mai, Yaoguang Rong, Michael Grtzel, Xiong Li

Issue&Volume: 2023-01-20

Abstract: 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.

DOI: add8786

Source: https://www.science.org/doi/10.1126/science.add8786