573720-89-5Relevant academic research and scientific papers
Bright and monochromic red light-emitting electroluminescence devices based on a new multifunctional europium ternary complex
Sun, Min,Xin, Hao,Wang, Ke-Zhi,Zhang, Yong-An,Jin, Lin-Pei,Huang, Chun-Hui
, p. 702 - 703 (2003)
A novel europium(III) complex, tris(dibenzoylmethanato)(2-4′-triphenylamino)imidazo[4,5-f]1,10- phenanthroline)europium(III), Eu(DBM)3(TPIP), is synthesized. The light-emitting center, hole-transporting triphenylamine and electron-transporting phenanthroline fragments are integrated into one molecule. A single-layer device of ITO/Eu(DBM)3(TPIP)(60 nm)/Mg0.9Ag0.1/Ag exhibits EuIII-based pure red emission with a maximum brightness of 19 cd m-2 at 13.5 V and 280 mA cm-2, and an onset driving voltage of 8 V. A four-layer device of ITO/TPD (20 nm)/Eu(DBM)3(TPIP) (40 nm)/BCP (20 nm)/AlQ(40 nm)/Mg0.9Ag0.1/Ag gives a maximum EuIII-based pure red emitting luminance of 1305 cd m-2 at 16 V and 255 mA cm-2 with an onset driving voltage of 6 V; the maximum external quantum yield and luminous yield are estimated to be 0.85% and 1.44 Im W-1, respectively, at 7.5 V and 0.25 mA cm-2.
