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Modeling light-matter interaction in hybrid plasmonic materials is vital totheir widening relevance from optoelectronics to photocatalysis. Here, weexplore photoluminescence from ZnO nanorods (ZNR) embedded with goldnanoparticles (Au NPs). A progressive increase in Au NP concentrationintroduces significant structural disorder and defects in the ZNRs, whichparadoxically quenches defect related visible photoluminescence (PL) whileintensifying the near band edge (NBE) emission. Under UV excitation, thesimulated semi-classical model realizes PL from ZnO with sub-band gap defectstates, eliciting visible emissions that are absorbed by Au NPs to generate anon-equilibrium hot carrier distribution. The photo-stimulated hot carriers,transferred to ZnO, substantially modify its steady-state luminescence,reducing NBE emission lifetime and altering the abundance of ionized defectstates, finally reducing visible emission. The simulations show that the changein the interfacial band bending at the Au-ZnO interface under opticalillumination facilitates charge transfer between the components. This workprovides a general foundation to observe and model the hot carrier dynamics inhybrid plasmonic systems.

Leveraging Plasmonic Hot Electrons to Quench Defect Emission in Metal -- Semiconductor Nanostructured Hybrids: Experiment and Modeling