Localized surface plasmon resonance of copper nanoparticles improves the performance of quasi-two-dimensional perovskite light-emitting diodes

Plasmonic nanoparticles (NPs) based on noble metals are often used for improving the performance of optoelectronic devices. Widescale use of these nanostructures for commercial applications, however, has been hampered by their high material cost. Herein, we use copper (Cu), which is more abundant and low-cost, to synthesis NPs; the NPs are further capped with polyvinylpyrrolidone to improve their ambient stability. The as prepared Cu NPs are incorporated into quasi-two-dimensional perovskite light-emitting diodes for increasing the device efficiencies. The luminous efficiency can be improved up to 115%. From the photoluminescent studies, we attribute the device enhancement to the plasmonic effects of Cu NPs. We anticipate that the cost-effective polymer-capped Cu NPs may trigger demand of plasmonic nanostructures for use in commercial optoelectronic devices.

Automated summary

Plasmonic nanoparticles based on copper were synthesized and capped with polymer to enhance ambient stability, leading to improved efficiencies in perovskite light-emitting diodes. The luminous efficiency can be increased by up to 115%, attributed to the plasmonic effects of the copper nanoparticles. The cost-effective polymer-capped copper nanoparticles may drive demand for plasmonic nanostructures in commercial optoelectronic devices.