Synthesis and electroluminescent property of ternary complexes Eu(TTA) 3M

• Published in: Journal of alloys and compounds 2010-03, Vol.492 (1), p.259-263
• Main Authors: Lv, Yuguang, Song, Chunxiang, Zhang, Yu, Sha, Jingquan, Liu, Cuijuan, Zhang, Fujun, Wang, Lingxuan
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electroluminescence; Electron emission spectroscopies; Exact sciences and technology; Luminescence; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other luminescence and radiative recombination; Physics; Sol–gel synthesis; Thin films
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2009.11.020

Three kinds of rare earth ternary complexes of Eu 3+ with HTTA and M (M = 5-NO 2Phen, 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) 35NO 2Phen posses the highest sensitized luminescent efficiency and the longest lifetime in the studied complexes. TG curves indicate that Eu(TTA) 35NO 2Phen is most stable. In device ITO/PVK/Eu(TTA) 35NO 2Phen/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 5D 0 → 7F 2 of Eu 3+ ion, and this process results in the enhancement of red emission from electroluminescence device.