In this work gold nanoparticles (Au NPs) are incorporated into a PEDOT:PSS layer, resulting in ∼4.0 fold enhanced fluorescence emission of a CH₃NH₃PbBr₃ film. Through experiments and theoretical simulation, we first demonstrated that the enhancement comes from the simultaneous near- and far-field effects of Au NP enhanced perovskite fluorescence.

Far-field plasmonic effect of Au nanoparticles was explored for high performance blue-light perovskite electroluminescent devices, achieving maximum luminance and external quantum efficiency as high as ~1110 cd m⁻² and 1.64%, respectively.

Organic-inorganic hybrid perovskite has attracted intensive attention from researchers as the gain medium in lasing devices. However, achieving electrically driven lasing remains a significant challenge. Modifying the devices’ structure to enhance the optically pumped amplified spontaneous emission (ASE) is the key issue. In this work, gold nanoparticles (Au NPs) are first doped into PEDOT: PSS buffer layer in a slab waveguide device structure: Quartz/PEDOT: PSS (with or w/o Au NPs)/CH₃NH₃PbBr₃. As a result, the facile device shows a significantly enhanced ASE intensity and a narrowed full width at half maximum. Based on experiments and theoretical simulation data, the improvement is mainly a result of the compound surface plasmon resonance, including simultaneous near- and far-field effects, both of which could increase the density of excitons excited state and accelerate the radiative decay process. This method is highly significant for the design and development and fabrication of high-performance organic-inorganic hybrid perovskite lasing diodes.