Enhanced blue emission from CsPb(Br/Cl)(3) perovskite nanocrystals by localized surface plasmon resonance of Au nanoparticles dagger
Author(s): Bao, L (Bao, Liang); Liu, WQ (Liu, Wenqiang); Chen, YH (Chen, Yonghua); Zhang, YB (Zhang, Yanbo); Zhang, Y (Zhang, Yang)
Source: JOURNAL OF MATERIALS CHEMISTRY C DOI: 10.1039/d0tc05535b Early Access Date: MAR 2021
Abstract: The local surface plasmon resonance effect induced by metal nanoparticles on perovskites provides a powerful approach to enhance the photoluminescence of such all-inorganic systems. Here, we show that the decoration of CsPb(Br/Cl)(3) nanocrystals (NCs) with Au nanoparticles (NPs) leads to a significant enhancement of the blue emission centered at 465 nm, resulting in a photoluminescence quantum yield (PLQY) of up to 73%. Our simulations based on finite difference time domain (FDTD) analysis indicate that the distance between the Au NPs and CsPb(Br/Cl)(3) NCs plays a crucial role in determining the local electric field intensity. Our data suggest that an excessive decoration of CsPb(Br/Cl)(3) NCs with Au NPs can also reduce the PLQY, as a result of decreased coupling strength.
Accession Number: WOS:000637072500001