One major concern for the commercialization of perovskite photovoltaic technology is the toxicity of lead from the water-soluble lead halide perovskites that can contaminate the environment. Here, we report an abundant, low-cost and chemically robust cation-exchange resin (CER)-based method that can prevent lead leakage from damaged perovskite solar modules under severe weather conditions. CERs exhibit both high adsorption capacity and high adsorption rate of lead in water due to the high binding energy with lead ions in the mesoporous structure. Integrating CERs with carbon electrodes and layering them on the glass surface of modules has a negligible detrimental effect on device efficiency while reducing lead leakage from perovskite mini-modules by 62-fold to 14.3 ppb in water. The simulated lead leakage from damaged large-area perovskite solar panels treated with CERs can be further reduced to below 7.0 ppb even in the worst-case scenario that every sub-module is damaged.

钙钛矿光伏技术商业化的主要关注点是水溶性卤化铅钙钛矿中铅的毒性，该铅可污染环境。在这里，我们报告了一种基于低成本，化学稳定性强的阳离子交换树脂（CER）的丰富方法，该方法可以防止在恶劣天气条件下受损的钙钛矿太阳能电池组件中的铅泄漏。由于中孔结构中与铅离子的高结合能，CERs在水中具有很高的吸附容量和铅吸附率。将CER与碳电极集成在一起，然后将其层叠在模块的玻璃表面上，对器件效率的影响可忽略不计，同时将钙钛矿微型模块在水中的铅泄漏降低了62倍至14.3 ppb。