Research

New phosphor materials emitting in deep red and near-infrared (NIR) regions based on oxide crystals doped with transition metal ions such as Cr³⁺, Mn⁴⁺ or Fe³⁺ for applications as non-contact luminescent temperature and pressure sensors or biological markers.
Studies of oxide phosphors doped with bismuth ions aimed to clarify the nature of Bi³⁺ ion emission occurring in these compounds in the UV and visible spectral ranges and to investigate the possibility of improving the efficiency of this emission for applications of these materials as optical radiation converters, for photovoltaics and white LEDs.
Development of new complex oxide materials applicable for radiation dosimetry based on thermally (TSL) and optically stimulated luminescence (OSL) phenomena. In particular, the materials having a high effective atomic number (Z) give the possibility to realize a passive dosimeter able to measure not only the dose of ionizing radiation but also to specify the energy range of unknown radiation fields and in such a way to recognize the radioactive source applied.
Studies of nitride crystals and layers, mainly GaN, doped with beryllium or carbon ions in order to clarify the nature of the yellow luminescence observed in the materials.
Studies of the effect of internal electric fields on the optical properties of nitride-based quantum well structures using high-pressure and time-resolved spectroscopy supported by theoretical modeling.
Studies of nitride (In,Ga,Al)N semiconductor structures with a compositional gradient with a view to achieving so-called polarization doping. This is a new concept for obtaining p- or n-type conducting regions by exploiting the presence of embedded electrical polarization in non-centrosymmetric nitride structures, without standard doping with other elements.
Study and development of oxide materials possessing a high mechanoluminescence efficiency as a promising candidate for fast and sensitive remote technology for the detection of a variety of mechanical stress in various industrial and biological applications.

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Group of High-Pressure Spectroscopy (ON4.1)

Research