Gu Shuai, Lin Renxing, Han Qiaolei, Gao Yuan, Tan Hairen, Zhu Jia
National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, No. 22 Hankou Rd., Gulou District, Nanjing, 210093, China.
Adv Mater. 2020 Jul;32(27):e1907392. doi: 10.1002/adma.201907392. Epub 2020 Feb 13.
Metal halide perovskites have recently attracted enormous attention for photovoltaic applications due to their superior optical and electrical properties. Lead (Pb) halide perovskites stand out among this material series, with a power conversion efficiency (PCE) over 25%. According to the Shockley-Queisser (SQ) limit, lead halide perovskites typically exhibit bandgaps that are not within the optimal range for single-junction solar cells. Partial or complete replacement of lead with tin (Sn) is gaining increasing research interest, due to the promise of further narrowing the bandgaps. This enables ideal solar utilization for single-junction solar cells as well as the construction of all-perovskite tandem solar cells. In addition, the usage of Sn provides a path to the fabrication of lead-free or Pb-reduced perovskite solar cells (PSCs). Recent progress in addressing the challenges of fabricating efficient Sn halide and mixed lead-tin (Pb-Sn) halide PSCs is summarized herein. Mixed Pb-Sn halide perovskites hold promise not only for higher efficiency and more stable single-junction solar cells but also for efficient all-perovskite monolithic tandem solar cells.
金属卤化物钙钛矿因其优异的光学和电学性能，最近在光伏应用中引起了极大关注。铅（Pb）卤化物钙钛矿在该材料系列中脱颖而出，功率转换效率（PCE）超过25%。根据肖克利-奎塞尔（SQ）极限，铅卤化物钙钛矿的带隙通常不在单结太阳能电池的最佳范围内。用锡（Sn）部分或完全替代铅正引起越来越多的研究兴趣，因为有望进一步缩小带隙。这使得单结太阳能电池能够实现理想的太阳能利用，并有助于构建全钙钛矿串联太阳能电池。此外，锡的使用为制造无铅或低铅钙钛矿太阳能电池（PSC）提供了一条途径。本文总结了在解决制造高效锡卤化物和混合铅锡（Pb-Sn）卤化物PSC的挑战方面的最新进展。混合Pb-Sn卤化物钙钛矿不仅有望用于更高效率和更稳定的单结太阳能电池，还可用于高效的全钙钛矿单片串联太阳能电池。
