Zinc　oxide　nanoparticles　(NPs)　are　currently　indispensable　electron　transport　layer　(ETL)　materials　in　achieving　high-performance　quantum　dot　(QD)　light-emitting　diodes　(QLEDs).　However,　due　to　the　high　conductivity　and　pervasive　surface　defects　of　ZnO　NPs,　excessive　electron　injection　and　exciton　quenching　at　the　QD/ETL　interface　restrain　the　practical　applications　of　QLEDs.　Here,　an　ionic　liquid　additive　is　introduced　to　construct　a　hybrid　ETL　with　ZnO　NPs.　Ionic　liquids　tend　to　anchor　at　the　defective　sites　of　ZnO　NPs　due　to　electrostatic　interactions　and　hydrogen　bonding.　This　modification　improves　the　surface　properties　of　QDs,　optimizing　the　interface　between　QDs　and　ETL,　which　in　turn　decreases　the　probability　of　nonradiative　recombination.　Additionally,　the　additives　modulate　the　energy　band　structure　of　ZnO　NPs,　resulting　in　a　higher　barrier　at　the　ETL/cathode　interface　to　decrease　the　level　of　electron　injection.　The　resultant　QLEDs　achieve　a　high　maximum　external　quantum　efficiency　(EQE)　of　26.71%　and　a　long　lifetime　(T95@1000　cd　m-2)　of　5140　h.　This　straightforward　approach　offers　a　viable　way　to　fabricate　high-efficiency　and　long　operation-lifetime　QLEDs.　©　2025　American　Chemical　Society.