Modification of alkali metal nanoparticles for enhanced light absorption and photoemission of InGaN nanowire arrays

Due to the important role played by local surface plasmon resonance (LSPR) in the fields of photocatalysis and solar cells, this article investigates InGaN nanowire arrays adsorbed by alkali metal (Li, Na, K, Cs) nanoparticles from two perspectives of light absorption and quantum efficiency . We simulate and model the structural parameters of nanoparticles , including their shape, position and size. The results show that Na nanoparticles have the best effect on improving the photoelectric conversion performance in the visible band. Although large diameters and high density nanoparticles can bring optical gain , their own losses will also increase. The relationship between the two should be balanced in the design. InGaN nanowires modified with Na nanoparticles with diameters of 20 nm and spacings of 50 nm can achieve optimal light absorption and photoemission in the visible range. Our research will contribute to the development of efficient visible light photocathodes .