Abstract
Abstract Three kinds of rare earth ternary complexes of Eu 3+ with HTTA and M (M = 5-NO 2 Phen, 2,2′-Dipy and TPPO) have been synthesized and characterized using various spectral techniques such as elemental analysis, TGA-DTA, IR, UV and fluorescent. Results show that the complexes of Eu(III) emit strong red luminescence when excited by UV light. The complex Eu(TTA) 3 5NO 2 Phen posses the highest sensitized luminescent efficiency and the longest lifetime in the studied complexes. TG curves indicate that Eu(TTA) 3 5NO 2 Phen is most stable. In device ITO/PVK/Eu(TTA) 3 5NO 2 Phen/Al, Eu 3+ may be excited by intramolecular energy transfer from ligands as observed by electroluminescence. The main emitting peak at 614 nm can be attributed to the transition of 5 D 0 → 7 F 2 of Eu 3+ ion, and this process results in the enhancement of red emission from electroluminescence device.
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