Tian Chenqing, Liu Dongxue, Dong Yixin, Wang Yajie, Yang Tinghuan, Yang Yang, Zhang Meng, Zhao Erxin, Wu Nan, Zhang Zheng, Yang Ye, Gong Yongshuai, Yan Buyi, Zhang Shengxiong, Zhang Lu, Niu Tianqi
Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China.
Three Gorges Corporation, Science and Technology Research Institute, Beijing 101199, China.
Materials (Basel). 2025 Jan 3;18(1):179. doi: 10.3390/ma18010179.
Perovskite solar cells (PSCs) can utilize the residual photons from indoor light and continuously supplement the energy supply for low-power electron devices, thereby showing the great potential for sustainable energy ecosystems. However, the solution-processed perovskites suffer from serious defect stacking within crystal lattices, compromising the low-light efficiency and operational stability. In this study, we designed a multifunctional organometallic salt named sodium sulfanilate (4-ABS), containing both electron-donating amine and sulfonic acid groups to effectively passivate the positively-charged defects, like under-coordinated Pb ions and iodine vacancies. The strong chemical coordination of 4-ABS with the octahedra framework can further regulate the crystallization kinetics of perovskite, facilitating the enlarged crystal sizes with mitigated grain boundaries within films. The synergistic optimization effects on trap suppression and crystallization modulation upon 4-ABS addition can reduce energy loss and mitigate ionic migration under low-light conditions. As a result, the optimized device demonstrated an improved power conversion efficiency from 22.48% to 24.34% and achieved an impressive efficiency of 41.11% under 1000 lux weak light conditions. This research provides an effective defect modulation strategy for synergistically boosting the device efficiency under standard and weak light irradiations.
钙钛矿太阳能电池（PSCs）可以利用室内光中的残余光子，并持续为低功率电子设备补充能量供应，从而在可持续能源生态系统中展现出巨大潜力。然而，溶液法制备的钙钛矿在晶格中存在严重的缺陷堆积，这损害了其低光效率和运行稳定性。在本研究中，我们设计了一种名为对氨基苯磺酸钠（4-ABS）的多功能有机金属盐，它同时含有供电子胺基和磺酸基团，能够有效钝化带正电的缺陷，如配位不足的铅离子和碘空位。4-ABS与八面体框架的强化学配位作用可以进一步调节钙钛矿的结晶动力学，促进薄膜内晶体尺寸增大且晶界减少。添加4-ABS后对陷阱抑制和结晶调制的协同优化效应能够减少能量损失，并减轻低光条件下的离子迁移。结果，优化后的器件功率转换效率从22.48%提高到了24.34%，并在1000勒克斯弱光条件下实现了41.11%的可观效率。本研究为在标准光照和弱光照射下协同提高器件效率提供了一种有效的缺陷调制策略。
