Journal
OPTICS LETTERS
Volume 47, Issue 15, Pages 3916-3919Publisher
Optica Publishing Group
DOI: 10.1364/OL.461926
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Funding
- Science and Technology Commission of Shanghai Municipality [19DZ2253000, 19XD1434600, 2019SHZDZX01]
- Science and Technology Innovation Program of Hunan Province [2021RC2068]
- Science Fund for Distinguished Young Scholars of Hunan Province [2020JJ2036]
- National Natural Science Foundation of China [62075240, 62105364]
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This study presents an in-depth investigation on the spontaneous emission properties of hybrid systems consisting of CsPbBr3 nanocrystals and silver nanostructures. The results show that when the energy of CsPbBr3 matches the oscillation frequency of Ag nanodisks, there is a significant increase in photoluminescence intensity and relaxation rate.
Integrating metal halide perovskites onto plasmonic nanostructures has recently become a trending method of enabling superior emissive performance of perovskite nanophotonic devices. In this work, we present an in-depth study on the spontaneous emission properties of hybrid systems comprising CsPbBr3 nanocrystals and silver nanostructures. Specifically, a 5.7-fold increment of the photoluminescence (PL) intensity and a 1.65-fold enhancement of the PL relaxation rate is attained when the transition energy of CsPbBr3 is spectrally resonant with the oscillational frequency of Ag nanodisks (NDs), which is attributed to the intense exciton-plasmon coupling-induced Purcell effect. Furthermore, a 540-fs ultrafast energy transfer from the CsPbBr3 excitons to Ag plasmons is revealed by femtosecond pump-probe experiments, suggesting the key mechanism responsible for the Purcell-enhanced radiative emission. Our finding offers a unique understanding of the enhanced emissive behavior in the plasmon-coupled perovskite system and paves the way for further applications. (C) 2022 Optica Publishing Group
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