Hybrid materials were synthesized using a high temperature reaction. We used 80PbF 2
Keywords hybrid materials, photoluminescence, europium coordination compounds
IntroductionHybrid materials (HM) based on metal-organic phosphors and inorganic glasses are promising materials for developing new light emitting devices [1][2][3]. Organic luminescent materials are highly efficient under optical and electric excitation. However, most of them are extremely unstable in air and need protection. The embedding of organic materials into transparent matrices may solve the degradation problem and lead to the manufacturing of new materials. Inorganic glass matrices are stable at higher temperatures than organic polymers, lacquers and compounds and their thermal expansion coefficients are less than those of organic matrices. In general, glasses are characterized by a high hardness and chemical resistance, as well as a resistance to radiation, especially UV.In our previous research concerning on the fabrication of bulk and film hybrid materials, we considered boron oxide [2-3] as a glass matrix. However, boron oxide is not an ideal candidate for application as a glass matrix: its melt viscosity at 400-500 °C is very high (~2×10 4 Pa*s), and its chemical resistance is insufficient. We made glasses in the PbF 2 -B 2 O 3 system in the 25-80 mol% PbF 2 composition range [4][5]. These glasses have lower melting temperatures and viscosity index. Our latter research dealt with HM based on PbF 2 -B 2 O 3 glass and Eu(NTA) 3 (Phen) [6] demonstrated a possibility to fabricate transparent and stable glassy HM's.
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