Pressure Dependent Integration of White Light Emission in SiQDs@EuZIF‐8 Metal Organic Frameworks

Abstract Metal−organic frameworks (MOFs) provide breakthroughs in nanophotonics with unique advantages in integrating white light emission with fluorescence and phosphorescence. With their porous properties and confined capacities, MOFs accommodate luminescent guests (LG), resulting in LG@MOFs systems. Encapsulation of silicon quantum dots (Si QDs) and europium (Eu) with Zeolitic Imidazolate Framework‐8 (ZIF‐8) (Si QDs@xEZIF‐8; x = 0.25, 0.5, and 0.75) enables multiple luminescence centers with a high photoluminescence quantum yield (PLQY) of 6.71% while suppressing the aggregation‐caused quenching (ACQ). The luminescence effect is enhanced by applying various pressures ranging from 0.074 to 0.52 GPa in [email protected]‐8 with a long emission of 2.04 ms at 0.52 GPa applied pressure, significantly enhancing solid‐state white light emission with a correlated color temperature (CCT) of 8482 K. In ambient conditions, the as synthesized material retains ≈75% of its initial intensity over 13 days and ≈78% under UV exposure for 75 minutes. The pressure‐induced white light emission from [email protected]‐8 exhibits excellent photostability which retaining over 88% of its initial intensity under continuous 397 nm excitation for 120 minutes without further degradation, significantly improving resistance to photodegradation. The confocal fluorescence microscopy (CFM) utilized to confirm the encapsulation technique, and time‐of‐flight secondary ion mass spectroscopy (TOF‐SIMS) provided the surface analysis of the pressure applied to [email protected]‐8.