For halide perovskites that are susceptible to photolysis and ion migration, iodide-related defects, such as iodine (I₂) and iodine vacancies, are inevitable. Even a small number of these defects can trigger self-accelerating chemical reactions, posing serious challenges to the durability of perovskite solar cells. Fortunately, before I₂ can damage the perovskites under illumination, they generally diffuse over a long distance. Therefore, detrimental I₂ can be captured by interfacial materials with strong iodide/polyiodide (I_x⁻) affinities, such as fullerenes and perfluorodecyl iodide. However, fullerenes in direct contact with perovskites fail to confine I_x⁻ ions within the perovskite layer but cause detrimental iodine vacancies. Perfluorodecyl iodide, with its directional I_x⁻ affinity through halogen bonding, can both capture and confine I_x⁻. Therefore, inverted perovskite solar cells with over 10 times improved ultraviolet irradiation and thermal-light stabilities (under 85 °C and 1 sun illumination), and 1,000 times improved reverse-bias stability (under ISOS-V ageing tests) have been developed.

对于易于光解和离子迁移的卤化物钙钛矿来说，与碘化物相关的缺陷，如碘（I ₂）和碘空位是不可避免的。即使这些缺陷很少，也会引发自加速化学反应，对钙钛矿太阳能电池的耐用性构成严峻挑战。幸运的是，在 I ₂在光照下损坏钙钛矿之前，它们通常会扩散很长的距离。因此，有害的I _{2可以被具有强碘化物/聚碘化物(I x} ^- )亲和力的界面材料捕获，例如富勒烯和全氟癸基碘。然而，与钙钛矿直接接触的富勒烯无法将 I _x ^-离子限制在钙钛矿层内，而是导致有害的碘空位。全氟癸基碘通过卤素键具有定向 I _x ^{-亲和力，可以捕获和限制 I} _x ^-。因此，我们开发出了紫外辐照和热光稳定性（在85℃和1个太阳光照下）提高10倍以上、反向偏压稳定性（在ISOS-V老化测试下）提高1000倍以上的倒置钙钛矿太阳能电池。