ИСТИНА

New method for single crystal growth of tris(8-oxiquinoline)aluminum (Alq3) by direct crystallization of melt under gradient of partial pressures of the ligand forming compound (8-hydroxiqionoline) and constant temperature has been developed. The method allows growing a certain polymorph depending on the chosen temperature and the p(8-Hq) range. The growth parameters have been determined through the investigation of p(8-Hq)-T diagram in the temperature range from RT to the Alq3 maximum melting temperature. Different single crystals of Alq3 polymorphs have been grown using 99.999 wt% raw materials. The luminescent properties of the grown crystals have been studied. The research was supported by Russian Science Foundation by the grant 19-79-10003.