3NH 3PbBr 3 perovskite nanoparticles in photochromic composites]]>

摘要

Graphical abstractHigh on/off contrast photo-switchable fluorescence is demonstrated by combining highly luminescent fluorophore, CH3NH3PbBr3perovskite nanoparticles and photochromic dye, spironaphthoxazine.Display OmittedHighlights?Fluorescence photo-switch is developed using perovskite nanoparticle fluorophore and photochromic photochromic dye.?On/off contrast over >10.0 is achieved by taking advantage of highly luminescent property of perovskite nanoparticles.?Turn on speed is effectively modulated by introducing the chelating additive that can retard photochromic reaction.AbstractIn this work, we report on the photo-induced fluorescence switching film by using CH3NH3PbBr3perovskite nanoparticle fluorophore and spironaphthoxazine photochromic dye for the first time. Attributed to the effective spectral overlap between absorption of spironaphthoxazine in ring-opened merocyanine form and emission of CH3NH3PbBr3energy transfer-induced fluorescence switching film is demonstrated. In addition, both highly luminescent optical property of CH3NH3PbBr3and efficient photochromic reactivity of spironaphthoxazine, enabled high emission on/off emission contrast (>10.0) and fast emission turn on (4.0s). Finally, modulation of the switching speed is successfully achieved by introducing the chelating agent into the photochrmic film, which effectively retards the rate of photochromic reaction of spironaphthoxazine.]]>