【摘要】 由于钙钛矿中间相的结晶过程对空气敏感,在大气环境中制备大面积钙钛矿光伏组件仍面临巨大挑战.本文中,我们将2-碘咪唑(IIZ)引入至钙钛矿前驱体溶液中,诱导形成了在空气中稳定的纯δ中间相.该中间相在退火后可完全转化为单一取向的α相钙钛矿薄膜,显著减少了缺陷密度和性能波动.基于这一方法,本工作实现了面积为927.5 cm~2的钙钛矿光伏组件,其稳态效率达20.9%,并表现出优异的可重复性.封装后的光伏组件符合严格的国际光伏测试标准(IEC61215:2021),在持续运行、冷热循环(-40至85℃)以及湿热(85℃和85%相对湿度)测试条件下均展现出优异的稳定性.更多还原

【Abstract】 Fabrication of large-area perovskite solar modules under ambient air conditions remains a critical challenge due to air sensitivity of perovskite intermediate phases during crystallization.Here,we introduce 2-iodoimidazole(IIZ) into the perovskite precursor,enabling the formation of an air-stable pure δ-phase intermediate,which,upon annealing,fully transforms into a highly oriented aphase perovskite film with reduced defects and variability.Leveraging this approach,we achieve a stabilized power conversion efficiency of 20.9% for 927.5 cm~2 perovskite solar modules with high reproducibility.The encapsulated modules meet stringent international photovoltaic testing standards(IEC61215:2021),demonstrating excellent stability under continuous operation,thermal cycling(-40 to 85℃) and damp heat(85℃ and 85% relative humidity).更多还原