Ultraviolet Upconversion Emission of CaAl2SiO6 Polycrystals Doped with Pr3+ Ions
Karol Lemański, Nadiia Rebrova, Patrycja Zdeb-Stańczykowska, Przemysław Jacek Dereń
Abstract:
The spectroscopic properties of Pr3+ ions in the aluminosilicate matrix were investigated for the first time. Synthesis of CaAl2SiO6 (CASO) polycrystals doped with Pr3+ ions was carried out using the sol–gel method. The crystalline structures have been confirmed with XRD measurement. The absorption, excitation, emission spectra, and time decay profiles of the praseodymium (III) ions were measured and analyzed. It was found that upon excitation with visible light, this material exhibits emission mainly in the UVC region, via an upconversion emission process. The Stokes emission in the visible range is observed mainly from the 3P0 and 1D2 energy levels. The 1D2→3H4 emission is very stable even at very high temperatures. The studied aluminosilicate phosphors possess characteristics that confirm their potential in upconversion emission applications.
