Proceedings of 13th Conference on Hybrid and Organic Photovoltaics (HOPV21)
Publication date: 11th May 2021
Here we add DMACI to the FA0.83Cs0.17Pb(IxBr1-x) perovskite precursor with x = 0.1 to 0.4 and study its impact on the perovskite formation. The DMACl changes the intermediate phase during the formation of the perovskite. A series of 2D XRD shows that the crystal orientation changes from a preferred corner-up to a face-up orientation for the FACs perovskite. It also impacts the surface morphology of the perovskite significantly leading to an almost needle-like growth of the perovskite for 100 mol% excess DMA. The DMA: FACs perovskite shows also a significant increase in stability under light, heat and humidity exposure compared to the commonly DMF/DMSO FACs perovskite. Our champion device reaches stabilised 18.2% and 16.1% in an n-i-p and a p-i-n stack respectively. The DMF/DMSO FACs control achieves stabilised 18.3% (n-i-p) and 14.8% (p-i-n).
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