近日，研究生杨晨在Science China Materials发表题为“Modulating luminescence of K3AlF6:Mn4+ NCs via charge compensation and localized surface plasmon resonance effect 通过电荷补偿和局域表面等离子体共振效应调制 K3AlF6:Mn4+纳米晶体的发光性质”的研究论文,通讯作者为周文理副教授等。
论文摘要：The reduction in photoluminescence efficiency due to crystallite downsizing is a significant issue in Mn4+ -doped fluoride nanomaterials, crucial for their application in full-color micro-LED displays. This study presents a strategy to enhance the photoluminescence efficiency of K3AlF6:Mn4+ nanocrystals (NCs) by incorporating Mg2+ for charge compensation and utilizing the plasmonic effect of Au nanorods. We found that Mg2+ incorporation effectively reduced lattice defects, increasing photoluminescence intensity by 17% and internal quantum efficiency from 22.37% to 27.56%. Fabricating Au@SiO2/fluoride nanocomposites, we investigated how the SiO2 spacer layer thickness, Au@SiO2 resonance wavelength, and relative concentration affect photoluminescence properties. Optimizing the balance between Purcell and F & ouml;rster resonance energy transfer effects further increased photoluminescence intensity by 25%, internal quantum efficiency to 32.09%, and external quantum efficiency from 14.20% to 18.05%. Additionally, we assessed the potential application of these nanocomposites in micro-LED display technology by examining nanocomposite-PMMA films. This work provides insights into the development of highly efficient red-emitting nanomaterials.
论文连接：https://link.springer.com/article/10.1007/s40843-024-3271-5
