Overview of Luminescent Materials Technology Platform

In the LumiLab research group, luminescent materials or phosphors are used in various domains of research and development. LED phosphor devices are mainly rare earth doped binary and ternary sulfides, nitrides or oxides for wavelength conversion in white LEDs. Phosphor-converted white LEDs are not only the technology of choice for high efficiency illumination but also, with slightly different requirements, for liquid crystal display backlights. Other luminescent compounds include mechanoluminescent materials (useful for pressure and stress sensing) and those showing persistent (glow-in-the-dark) luminescence . The latter are used for safety illumination, indicators and medical imaging. Materials are synthesized in-house, using solid state synthesis, sol-gel, precipitation and solvothermal synthesis.

Various facilities are available to study the structural and optical properties of phosphors: fluorescence excitation and emission spectroscopy (PL, PLE), absorption spectroscopy (UV-Vis-NIR, DRS), decay measurements, spectroscopic ellipsometry, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). X-ray absorption spectroscopy (XAS) is used at synchrotron facilities as a tool to investigate the local properties and valence state of the rare earth ions in host crystals. Finally, thermoluminescence (TL) spectroscopy and cathodoluminescence (CL) spectroscopy are used as related analytical techniques.

Research Theme Links

Research themes that benefit from phosphors include advanced photonic materials.

Application Links

Applications utilizing the luminescent materials technology platform include energy and lighting, and designs incorporating enhanced materials.

NB-Photonics member expertise

Specific information on phosphor-related research subjects and publications can be found on the LumiLab website.

Detailed information on the listed experts can be found on the who we are page.

Dirk Poelman
Philippe Smet