Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 12: POSTER Colloids, Nanoparticles and Self-Organizing Systems

CPP 12.25: Poster

Dienstag, 28. März 2006, 17:00–19:00, P3

Luminescence of ZnMnP₂O₇ clusters in powders of KBr — •Olga Gomenyuk¹, Sergiy Nedilko¹, Iryna Nedeylko¹, Olexander Sleptsov¹, Vasil Scherbatskii¹, Nadija Antraptseva², Volodymyr Bojko², and Nadija Tkachova² — ¹Taras Shevchenko Kyiv National University, Department of Physics,. 2, block 1, Acad. Glushkova ave., Kyiv 03680, Ukraine — ²National Agriculture University, Geroiv Oborony st., 8, Kyiv 03041, Ukraine

Diphosphates of divalent metals (zinc, manganese) are the object of interest as multifunctional materials. The contents of cations in solid solutions, their physical, e.g. optical and luminescent properties are determined by the composition of initial reagents. Mentioned compounds were synthesized by precipitation of the suitable cations. Luminescence properties were investigated in the spectral region from 50 to 1100 nm at 4.2, 10, 77 and 300 K temperatures using visible, ultraviolet and vacuum ultraviolet (synchrotron) radiation for excitation of luminescence. Structure and peak positions of the luminescence bands depend on the samples temperature and excitation wavelength. The bands were considered as caused by both inner transitions in manganese ions, recombination of the self trapped excitons and emission of defects. Dependences of the luminescence intensity on the composition of the mentioned phosphates and their content in KBr are analyzed. Experiments with of synchrotron radiation use were done at SUPERLUMI, HASYLAB, Germany.