Photo- and electroluminescent properties europium complexes using bistriazole ligands

摘要

Luminescent properties of two heteroleptic dibenzoylmethanate europium(III) complexes with 1,3-bis(5-pyridin-2-yl-1 ,2,4-triazoi-3-yl)propane (H_2L~1) and 1,4-bis(5-pyridin-2-yl-1,2,4-triazol-3-yi)butane (H_2L~2) as ancillary ligands are described. The two double-layer-type electroluminescent cells with the structures: (1) ITO/NPB(40nm)/Eu(DBM)_2HL~1 (40nm)/LiF (1 nm)/Al (100nm) and (2) ITO/NPB(40nm)/Eu(DBM)_2HL~2 (40nm)/LiF (1 nm)/Al (l00nm) emit red light originating from the europium complexes. The device 2 gives the maximum brightness of 455 cd/m~2 at 19.2 V.