Promising Photoluminescence Enhancement of Tris(8-hydroxyquinoline)aluminum by Simultaneous Localized and Propagating Surface Plasmons of Ag Nanostructures

The continuous performance optimization of tris(8-hydroxyquinoline)aluminum (Alq3) materials is great significance during the commercialization process organic light-emitting diodes (OLEDs). In incorporating Ag nanostructures into Alq3, photophysical properties are greatly improved by plasmon–exciton coupling effect. Localized surface plasmons (LSPs) in nanoparticles (NPs) efficiently increased absorption ability. coexistence LSPs and propagating (PSPs) nanowires (NWs) leads to a PL enhancement 5.3-fold full-width at half maximum (FWHM) narrowed 10 nm. Temperature-dependent measurements exhibit that plasmonic density states (DOS) increases with decreasing temperature below 40 °C, thermal exchange can be accelerated introduction nanostructures. Effective suppression accumulation effect further proved excitation intensity (EI)-dependent measurements. We also found could mainly change y coordinates International Commission on Illumination (CIE), leading higher brightness. 5372 K color an NWs-embedded composite suitable for daylight-type fluorescent OLEDs. results would pave effective way optimizing optical