Interfacial Embedding for High-Efficiency and Stable Methylammonium-Free Perovskite Solar Cells with Fluoroarene Hydrazine

Dhruba B. Khadka, Yasuhiro Shirai, Masatoshi Yanagida, Terumasa Tadano, Kenjiro Miyano

Adv. Energy Mater. 2022, 2202029

doi.org/10.1002/aenm.202202029

Surface treatment with fluoroarene derivatives increases the efficiency and long-term stability of MA/Br-free #perovskites.

Recently, researchers at the National Institute for Materials Science reached a certified 21% efficiency on a 1cm^2 #perovskite solar cell that does not contain the thermally unstable methylammonium (MA) or Br. This was possible through surface passivation based on fluoroarene derivatives. The passivated device retains 80% of the performance after 300h at 60-65% of humidity and about 90% after 500h at 65°C.

With #Paios from FLUXiM AG they measured lower defect density and slower photovoltage decay by means of capacitance-voltage (CV) and transient photovoltage (TPV), respectively, which confirms defects passivation. Paios is an all-in-one instrument that allows full optoelectrical characterization of solar cells and LEDs.