Influence of Synthesis Parameters on Luminescence of Thenoyltrifluoroacetone Europium Powders

Abstract

In the last years the development of new luminescent materials was grow highly in order to find efficient materials with low cost of processing. In this way the organic luminescent materials have special attention because its special characteristics, like antenna effect, low temperature processing, possibility to make translation to polymeric and flexible compounds. In this work luminescent powders of TTA:Eu 3+ by sol-gel method were synthesized in order to define the synthesis parameters of the highest luminescence. The temperatures of heat treatment were 80˚C, 100˚C, 200˚C and the concentration of Europium where 10%, 20%, 30% and 40% mol (TTA-10Eu, TTA-20Eu, TTA-30Eu, and TTA-40Eu). Fourier Transform Infrared Rays analysis (FTIR) and emission luminescence measures, the best conditions of synthesis were obtained at 40% mol of Europium and 80˚C of heat treatment, at 272 nm of excitation. All the samples present the corresponded Eu 3+ ion transitions the 5 D 0 → 7 F J (J = 0, 1, and 2). This confirms the great possibilities of these materials for optoelectronic applications.

Electrolytic Synthesis and Tolyltriazole Modification of Dendritic Silver Powders for High‐performance Electrically Conductive Adhesives

“…The Ag peaks have a high intensity, indicating high crystallinity. It is also worth noting that three low peaks situated at 32.9°, 35.1°, and 47.2° are presented in the XRD pattern, implying the Ag‐TTA compound with low crystallinity is successfully coated on the surface of silver particles, similar to the XRD result of TTA : Eu 3+ obtained at 80 °C [11] …”

“…It is also worth noting that three low peaks situated at 32.9°, 35.1°, and 47.2°are presented in the XRD pattern, implying the Ag-TTA compound with low crystallinity is successfully coated on the surface of silver particles, similar to the XRD result of TTA : Eu 3 + obtained at 80 °C. [11] The infrared spectrum of TTA-coated DSPs is depicted in Figure 2. The benzene ring characteristic peaks are found at 1560 cm À 1 , 1500 cm À 1 , and 1460 cm À 1 , while the peaks at 1430 cm À 1 and 1140 cm À 1 are attributed to the N=N characteristic peak and the CÀ N bending vibration peak, respectively.…”