Enhanced Energy-Transfer Properties in Core-Shell Photoluminescent Nanoparticles Using Mesoporous SiO2 Intermediate Layersopen access
- Authors
- Sim, WH[Sim, Woo Hyeong]; Kim, S[Kim, Seyun]; Shin, WH[Shin, Weon Ho]; Jeong, HM[Jeong, Hyung Mo]
- Issue Date
- Feb-2020
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- mesoporous silica; rare-earth phosphor; sol-gel method; core-shell; photoluminescent property
- Citation
- KOREAN JOURNAL OF METALS AND MATERIALS, v.58, no.2, pp.137 - 144
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- KOREAN JOURNAL OF METALS AND MATERIALS
- Volume
- 58
- Number
- 2
- Start Page
- 137
- End Page
- 144
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/5829
- DOI
- 10.3365/KJMM.2020.58.2.137
- ISSN
- 1738-8228
- Abstract
- Multi-layer core-shell nanoparticles (YVO4:Nd3+/mSiO(2)/SiO2) consisting of silica cores (SiO2), mesoporous silica (mSiO(2)) intermediate layers, and Neodymium doped rare-earth phosphor (YVO4:Nd3+) shell layers were successfully synthesized using the stepwise sol-gel method. The morphological structure and optical properties of the functional core-shell nanoparticles were characterized and evaluated by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) analysis. mSiO(2) intermediate layers were utilized as the bridge between the core and shell materials. Their porous surfaces served to anchor the YVO4:Nd3+ crystals. This prevents energy loss during the energy transfer of electrons, resulting in improved optical properties. The use of intermediate layer combinations of mSiO(2)/SiO2 in the coreshell structure also improved cost-effectiveness, because the core is filled with cheap silica, not expensive phosphors. Even though the nanoparticles used only a thin layer of the photoluminescent shell materials, the optical properties, resulting from the energy-transfer emitting mid-infrared light, were remarkably enhanced by increasing the crystallinity of the phosphor. To demonstrate the practical use of the synthesis method, the photoluminescent properties of the core-shell nanoparticles were optimized by adjusting the annealing temperature and scaling to mass production. We believe that our efficient synthetic strategy provides a facile way of obtaining functional, cost-effective core-shell nanoparticles with improved photoluminescent properties.
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Collections - Engineering > School of Mechanical Engineering > 1. Journal Articles
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