Photoluminescence enhancement of perovskite CsPbBr3 quantum dots by plasmonic Au nanorods

Plasmonic Au nanorods/CsPbBr 3 quantum dots film has been prepared via spin-coating. It is found that photoluminescence intensity of Au nanorods/CsPbBr 3 quantum dots film exhibits 2-fold enhancement compared with pristine CsPbBr 3 quantum dots film. Time-resolved photoluminescence decay curves show that the lifetime of CsPbBr 3 quantum dots film decreases from 6.15 ns to 4.78 ns after combining with Au nanorods. The finite-difference time-domain simulation indicates that Au nanorods arouse a localized surface plasmon resonance around 500 nm, which enhances the emission intensity of CsPbBr 3 quantum dots film.