Abstract
HighlightsA facile and effective surface passivation strategy was demonstrated to improve the optical and stability of CsPbI3 nanocrystals by using guanidinium iodide post-treatment.Guanidinium cations was shown to be compatible with CsPbI3 perovskite, leading to significantly improved surface properties of CsPbI3 nanocrystals.Performance of the CsPbI3 nanocrystal-based light-emitting device was enhanced by 3.6 folds.
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