Hu Yanqiang, Cai Lijuan, Xu Zong, Wang Zhi, Zhou Yifan, Sun Guangping, Sun Tongming, Qi Yabing, Zhang Shufang, Tang Yanfeng
School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226001, China.
School of Physics and Photoelectronic Engineering, Ludong University, Yantai, Shandong 264025, China.
Inorg Chem. 2023 Apr 10;62(14):5408-5414. doi: 10.1021/acs.inorgchem.2c04316. Epub 2023 Mar 27.
All-inorganic CsPbIBr with outstanding thermal stability and excellent photoelectric properties is considered as a promising candidate for photovoltaic applications. However, the efficiency of CsPbIBr perovskite solar cells (PSCs) is still much lower than that of their organic-inorganic hybrid counterparts or CsPbI-based devices. Herein, we obtained an optimized CsPbIBr PSC (0.09 cm) with a champion efficiency of 17.38% and a record fill factor of 83.6% by introducing potassium anthraquinone-1,8-disulfonate (DAD) in the precursor solution. The synergistic effect between the electronegative functional groups and K ions in the DAD structure can not only effectively regulate the crystallization growth process to improve the crystalline quality and stability of photo-active CsPbIBr but also optimize the energy level alignment and passivate the defects to improve the carrier transport properties. The efficiency of the corresponding large-area device (5 cm × 5 cm with an active area of 19.25 cm) reached 13.20%. Moreover, the optimized CsPbIBr PSC exhibited negligible hysteresis and enhanced long-term storage stability as well as thermal stability. Our method produces more stable photo-active CsPbIBr with excellent photoelectric properties for industrial applications or perovskite/silicon tandem cells.
具有出色热稳定性和优异光电性能的全无机CsPbIBr被认为是光伏应用的有前途的候选材料。然而，CsPbIBr钙钛矿太阳能电池（PSC）的效率仍远低于其有机-无机杂化同类产品或基于CsPbI的器件。在此，我们通过在前驱体溶液中引入蒽醌-1,8-二磺酸钾（DAD），获得了优化的CsPbIBr PSC（0.09平方厘米），其冠军效率为17.38%，填充因子达到创纪录的83.6%。DAD结构中带负电的官能团与K离子之间的协同效应不仅可以有效调节结晶生长过程，以提高光活性CsPbIBr的结晶质量和稳定性，还可以优化能级排列并钝化缺陷，以改善载流子传输特性。相应大面积器件（5厘米×5厘米，有源面积为19.25平方厘米）的效率达到13.20%。此外，优化后的CsPbIBr PSC表现出可忽略不计的滞后现象，并增强了长期存储稳定性以及热稳定性。我们的方法生产出了具有优异光电性能的更稳定的光活性CsPbIBr，可用于工业应用或钙钛矿/硅串联电池。
