ИСТИНА

A new technique for analysis of "Ligand partial pressure - Temperature" diagram have been developed for the metal-organic phosphor tris(8-hydroxyquinoline) M ( M=Al, Ga, In). The detection of mono- and bivariant equilibriums within the p(8-Hq)-T diagram have been done using simultaneous measurements of photoluminescence and reflection spectra of a condense phase under controlled p(8-Hq) and T. Using preparations with the purity better 99.999 wt% the corresponding p(8-Hq)-T diagrams were plotted in the temperature range from 350 K to the maximum melting temperatures. The homogeneity ranges of different polymorphs vs nonstoichiometrical composition have been established. For the alfa-phases it were demonstrated that changing the synthesis conditions within the homogeneity range of the phases resulted to the drastically changes of the nonstoichiometry, cell volumes, chemical activities and electroluminescent properties of the OLED structures, prepared on the base of alfa-Mq3. The rese arch was supported by the Russian Foundation for Basic Research by grant 16-32-60035.