Author/Authors :
Lv، نويسنده , , Yuguang and Zhao، نويسنده , , Yuehui and Yang، نويسنده , , Zhiwei and Liu، نويسنده , , Cuijuan and Yan، نويسنده , , Hong and Li، نويسنده , , Gang and Liu، نويسنده , , Hong and Xie، نويسنده , , Jie، نويسنده ,
Abstract :
Rare earth ternary complex of Eu3+ with 4,7-2NH2 Phenanthroline and HTTA was synthesized, and it contents and structures were postulated based on elemental analysis, FT-IR spectra and UV–vis spectra. Results show that the complex of Eu(III) emit strong red luminescence when excited by UV light. Eu(TTA)(2NH2-Phen)3 has the higher sensitized luminescent efficiency and longer lifetime. In device ITO/PVK/Eu(TTA)(2NH2-Phen)3/Al, Eu3+ 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 5D0 → 7F2 of Eu3+ ion and this process results in the enhancement of red emission from electroluminescence device.
Keywords :
Synthesis , Ternary complexes , energy transfer , electroluminescence
