Flexible perovskite solar cells (f-PSCs) have experienced rapid advancements due to the light-weight, flexibility, and solution processability of the perovskite materials, which prompted the power conversion efficiency (PCE) to 24.08%. However, f-PSCs still face challenges in terms of mechanical and environmental stability. This is primarily due to their inherent brittleness, the presence of residual tensile strain, and the high density of defects along the boundaries of perovskite grains. To this end, we carefully developed a cross-linkable elastomers 3-[(3-acrylamidopropyl)dimethylammonium] propanoate (ADP) with electrostatic dynamic bond, which could be in-situ cross-linked and coordinate with [PbI₆]⁴⁻ to regulate the crystallization process of perovskite. The cross-linked elastomers attached to the perovskite grain boundaries could release the remaining tensile strains and mechanical stresses, leading to enhanced stability and flexibility of the f-PSCs. More importantly, the electrostatic interaction between positive and negative groups of cross-linked elastomers and hydrogen bond formation between N–H and C=O accelerate the cross-linking of ADP, endowing the flexible perovskite films with self-healing ability under mild treating conditions (60 °C for 30 min). As a result, the device achieves a remarkable PCE of 23.53% (certified 23.16%). Additionally, the device exhibits impressive mechanical sustainability and durability, retaining over 90% of initial PCE even after undergoing 8,000 bending cycles.

由于钙钛矿材料的轻质、柔性和溶液加工性能，柔性钙钛矿太阳能电池（f-PSC）得到了快速发展，使得功率转换效率（PCE）达到24.08%。然而，f-PSC 在机械和环境稳定性方面仍面临挑战。这主要是由于它们固有的脆性、残余拉伸应变的存在以及沿钙钛矿晶粒边界的高密度缺陷。为此，我们精心研制了一种具有静电动态键的可交联弹性体3-[(3-丙烯酰氨基丙基)二甲基铵]丙酸酯(ADP)，它可以原位交联并与[PbI ₆ 来调节钙钛矿的结晶过程。附着在钙钛矿晶界上的交联弹性体可以释放剩余的拉伸应变和机械应力，从而提高 f-PSC 的稳定性和灵活性。更重要的是，交联弹性体正负基团之间的静电相互作用以及N-H和C=O之间氢键的形成加速了ADP的交联，赋予柔性钙钛矿薄膜在温和处理条件下的自修复能力（60°C，30 分钟）。结果，该器件的 PCE 达到了 23.53%（认证为 23.16%）。此外，该器件还表现出令人印象深刻的机械可持续性和耐用性，即使在经历 8,000 次弯曲循环后仍能保持 90% 以上的初始 PCE。