| 초록 |
Although perovskite quantum dots (PeQDs) have attracted much attention, potential applications have been limited due to their low emission efficiency under near-infrared (NIR) excitation. Recently, upconversion nanoparticle (UCNP)-perovskite nanohybrids have been reported, but the low quantum yields of UCNPs and PeQDs film have remained challenges. Here, significant luminescence enhancement of PeQDs was achieved under NIR excitation through sensitization by UCNPs and plasmonic coupling. An overall 29-fold upconversion enhancement was attained by integrating gap plasmonic effect into via metal-insulator-metal configuration. Furthermore, by designing amphiphilic diblock copolymer capped gold nanorods layer as a top metallic layer, PL quenching and deformation were suppressed. This study provides a novel route to prepare highly efficient emissive devices based on MIM configurations using an insulator layer composed of UCNPs and PeQDs, applicable in a wide range of fields. |
