Site Occupancy Studies and Luminescence Properties of Emission Tunable Phosphors Ca9La(PO4)7:Re (Re = Ce3+, Eu2+).
Mubiao XieHaifeng WeiWeijie WuPublished in: Inorganic chemistry (2019)
The structure, site occupancies, and photoluminescence (PL) properties of Ce3+- or Eu2+-doped Ca9La(PO4)7 phosphors were investigated in this work. The powder X-ray diffraction (XRD) data and Rietveld refinement results showed that the phosphors are pure phases. The vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) spectra and decay curves confirmed that the Ce3+ and Eu2+ ions in Ca9La(PO4)7 occupied two crystal sites. Additionally, the tunable color can be obtained by adjusting doping concentration and altering temperature. The fabricated w-LED lamp based on Eu2+-doped Ca9La(PO4)7 phosphor gave properties with a color rendering index (CRI) of 85.26, CIE chromaticity coordinates of (0.358, 0.307), and color temperature (CCT) of 4329 K.
Keyphrases
- energy transfer
- quantum dots
- light emitting
- visible light
- sensitive detection
- protein kinase
- magnetic resonance imaging
- high resolution
- electronic health record
- computed tomography
- magnetic resonance
- metal organic framework
- artificial intelligence
- case control
- data analysis
- water soluble
- solid state
- single molecule
- aqueous solution