Kong, TengfeiXie, HaibingZhang, YangSong, JingLi, YahongLim, Eng LiangHagfeldt, AndersBi, Dongqin2021-08-142021-08-142021-08-142021-07-2610.1002/aenm.202101018https://infoscience.epfl.ch/handle/20.500.14299/180579WOS:000678855700001Longevity is a long-standing concern for organic-inorganic hybrid perovskite solar cells (PSCs). Recently, the use of low dimensional perovskite has been proven to be a promising strategy to improve the stability of PSCs. Herein, it is demonstrated that 1D perovskitoid based on 2-diethylaminoethylchloride cations can act as a template to induce 1D@3D perovskite structure, leading to smoother surface texture, longer charge-carrier lifetime, smaller residual tensile strain, and reduced surface-defect density in the perovskite film. With this strategy, highly efficient and stable 1D@3D PSC with excellent reproducibility, showing a champion power conversion efficiency (PCE) of 22.9% under standard AM 1.5 G one sun illumination is realized. The unencapsulated optimized devices can retain 94.7%, 92.4%, and 90.0% of their initial PCEs for 2100, 2200, and 2200 h under ambient air, 85 degrees C and illumination conditions, respectively.Chemistry, PhysicalEnergy & FuelsMaterials Science, MultidisciplinaryPhysics, AppliedPhysics, Condensed MatterChemistryEnergy & FuelsMaterials SciencePhysics1d2-diethylaminoethylchloride hydrochlorideadditivesperovskitoidstemplatesenvironmental stabilityperformancedegradationmigrationimprovescationsimpacttext::journal::journal article::research article