Tunable Fluorescein-Encapsulated Zeolitic Imidazolate Framework-8 Nanoparticles for Solid-State Lighting

A series of fluorescein-encapsulated zeolitic imidazolate framework-8 (fluorescein@ZIF-8) luminescent nanoparticles with a scalable guest loading has been fabricated and characterized. The successful encapsulation the organic dye (fluorescein) is supported by both experimental evidence theoretical simulations. measured optical band gap found to be comparable computed values hypothetical guest-host system. Isolated monomers aggregates species fluorescein confined in ZIF-8 nanocrystals have systematically investigated through fluorescence lifetime spectroscopy. quantum yield (QY) obtained solid-state materials particularly high (QY~98%), especially when concentration low. Combining blue LED chip thin photoactive film fluorescein@ZIF-8, we demonstrate device good tunability for multicolor white light emissions. Additionally, show that fluorescein@ZIF-8 exhibit an improved photostability due shielding effect conferred nanoconfinement host framework, making them promising candidates practical applications such as lighting, photonics, communications.