Massive amplification of photoluminescence and exceptional water stability of MAPbBr₃nanocrystals through core–shell nanostructure formation in a self-defence mechanism

Abstract

Vulnerability to the atmospheric condition and associated toxicity limit perovskite’s practical/industrial use despite its tremendous promises in optoelectronics. This report plies an ionic liquid like solvent to synthesize methylammonium lead...

Enhanced Photostability of the Colloidal Ruddlesden–Popper Perovskite Nanoplate through 4-Fluorobenzylammonium Iodide-Mediated Surface Engineering for Photoluminescent Application

“…The lifetime decays were fitted to a biexponential function. The short lifetime component of 7.8 ns (22.2%) possibly originates from band-to-band excitonic recombination, and the long lifetime component of 12.4 ns (77.8%) possibly arises from surface trap-assisted recombination. ,− After treatment, the excitonic decay component becomes 10.8 ns with a 55.6% contribution, indicating a longer contribution. The surface trap-assisted recombination lifetime becomes 19.7 ns, where the amplitude decreases to 44.4% compared to the parent NPl.…”

Green synthesis of 3D cesium lead halide perovskite nanocrystals and 2D Ruddlesden–Popper nanoplatelets in menthol-based deep eutectic solvents

“…OAmX salts were prepared by the procedure reported in our previous publication. 17 In short, 10 ml of oleylamine (OAm) was taken along with the required amount of hydrohalic acid (For OAmBr 1.28 mL of HBr and for OAmI 1.5 mL of HI) in a 25 mL two-neck round-bottomed flask. The resulting reaction mixture was heated at 120 °C for 2 h in a nitrogen atmosphere.…”

“…Recently, we employed highly hydrophobic lauric acid to prepare a methylammonium laurate IL medium, which finally leads to the formation of water stable MAPbBr 3 @laed laurate core-shell nanostructure with near-unity PLQY. 17 One of the major drawback of this IL-based alternate solvent media is the poor solubility of the precursor salts. The use of solid lead halide salts for synthesizing perovskites in IL media restricts the possibility of the doping and synthesis of mixed perovskite materials.…”

“…The use of solid lead halide salts for synthesizing perovskites in IL media restricts the possibility of the doping and synthesis of mixed perovskite materials. 16,17 The only solution is to increase a universality of the alternate solvent, where both the hydrophobic and hydrophilic precursors are soluble. To tackle this issue we have used menthol based DESs (Fig.…”

“…Recently, we employed highly hydrophobic lauric acid to prepare a methylammonium laurate IL medium, which finally leads to the formation of water stable MAPbBr 3 @laed laurate core–shell nanostructure with near-unity PLQY. 17…”