Fig. 2From: Facile synthesis of two-dimensional Ruddlesden–Popper perovskite quantum dots with fine-tunable optical propertiesPL emission spectra of 2D RP perovskite QDs with a Br series and b I series with varied n values. The corresponding quantum yield of 2D RP perovskite QDs with c Br series and d I seriesBack to article page