Photo- and electroluminescent properties europium complexes using bistriazole ligands

Alexey N Gusev; Victor F Shul'gin; Galina Nishimenko; Miki Hasegawa; Wolfgang Linert

doi:10.1016/j.synthmet.2012.12.020

Photo- and electroluminescent properties europium complexes using bistriazole ligands

Synth Met. 2013 Jan 15;164(C):17-21. doi: 10.1016/j.synthmet.2012.12.020.

Authors

Alexey N Gusev¹, Victor F Shul'gin, Galina Nishimenko, Miki Hasegawa, Wolfgang Linert

Affiliation

¹ Taurida National V.I. Vernadsky University, Simferopol 95007, Ukraine.

Abstract

Luminescent properties of two heteroleptic dibenzoylmethanate europium(III) complexes with 1,3-bis(5-pyridin-2-yl-1,2,4-triazol-3-yl)propane (H₂L¹) and 1,4-bis(5-pyridin-2-yl-1,2,4-triazol-3-yl)butane (H₂L²) as ancillary ligands are described. The two double-layer-type electroluminescent cells with the structures: (1) ITO/NPB(40 nm)/Eu(DBM)₂HL¹ (40 nm)/LiF (1 nm)/Al (100 nm) and (2) ITO/NPB(40 nm)/Eu(DBM)₂HL² (40 nm)/LiF (1 nm)/Al (100 nm) emit red light originating from the europium complexes. The device 2 gives the maximum brightness of 455 cd/m² at 19.2 V.

Keywords: 1,2,4-triazole derivatives; Electroluminescence; Eu(III) complex; Photoluminescence.