Coordination compounds of Europium(III)  are excellent materials for a new generation of light emitting devices with high efficiency, easy color tuning, temperature insensitivity, and high stability. Compounds Eu(TTA)3(Ph3PO)2, Eu(DBM)3Phen and Eu(o-MBA)3Phen  and polymer nanocomposites (NCs) on their base were obtained. For coordonation of Eu3+ as active ligands were used TTA (thenoyltrifluoroacetonato (C8H5F3O2S)), DBM (dibenzoylmethane)and o-MBA – omethyl benzoate and as neutral ligands Ph3PO (triphenyl phosphine oxide) and  Phen (1,10phenanthroline). As polymer PEPC (poly-N-epoxypropyl carbazole) was used.   The NCs were obtained from the colloidal solutions of mentioned compounds and polimer by carefully ultrasonication. The deposition of layers were carried out by spin-coating method on quartz substrates and subsequent drying.   The particle sizes were determined by Transmission Electron Microscopy(TEM) and Scanning Electron Microscopy(SEM). On obtained samples thermogravimetric analysis (TGA) was studied.  On Figure 1 are shown the TGA graphics of NCs.