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Jiyun's Paper on Stability Bowing in Perovskites is released

11/2021 -  "Intercalating-Organic-Cation-Induced Stability bowing in Quasi-2D Metal-Halide Perovskites" in ACS Energy Letters

Perovskites do not cease to surprise us. Cation engineering on our high-throughput automated research platforms is a great way to screen these fascinating materials.

In our new paper titled "Intercalating-Organic-Cation-Induced Stability bowing in Quasi-2D Metal-Halide Perovskites" in ACS Energy Letters (/10.1021/acsenergylett.1c02081) we focus on Quasi-2D metal-halide perovskites with Ruddlesden−Popper structures which have shown promising stability due to the protective effects of the intercalating organic cations. W #research #e use a high-throughput-robot platform to fabricate over 300 perovskite films and study the effect of cations and their concentrations on the thermal stability of perovskite films. We find that approximately 20−25 mol % of intercalating organic cations into MAPbI3 (nominal n = 4/5) can maximize the film stability, while higher/lower concentrations lead to inferior stability, which is termed stability bowing in analogy to band-gap bowing. A model with two competitive effects of the intercalating organic cation (better protection vs more defects) is proposed to rationalize this behavior. We anticipate this work to provide new insights into the stability of quasi-2D perovskites.


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