Green-light emitting norbornene based terbium-containing copolymers. Synthesis, photo- and electroluminescent properties

New terbium-containing copolymers were prepared by ring-opening metathesis copolymerization (ROMP) of norbornene substituted terbium complex Tb(L1)(2)(L2)(TPP0)(2) (L1 = 1-pheny1-3-methy1-4-isobutyry1-5-pyrazolona to, L2 = 1-phenyl-3-methyl-4-(5-bicyclo[2.2.1]hept-5-en-2-y1)-5-pyrazolonato, TPPO = triphenylphosphine oxide) and carbazole-containing norbornene derivatives. The photoluminescence (PL) spectra of the copolymers contained strong narrow bands of terbium ion at 492 (D-5(4)-> F-7(6)), 550 (D-5(4)-> F-7(6)), 586 (D-5(4) -> F-7(4)), 624 (D-5(4) -> F-7(3)) nm and emission in the region of 350-450 nm assigned to copolymer matrixes.The electroluminescence (EL) spectrum of the tree-layer device of configuration of ITO/Tb-copolymer(40 nm)/BATH(30 nm)/A1q(3)(30 nm)/Yb revealed intense emission bands of Tb(III) ions and a broad band at ca. 520 nm of low intensity attributed to emission from triplet level of carbazole groups. The maximum luminance of 70 cd/m(2) at 17.5V, the maximum current efficiency of 0.56 cd/A at 11 V and the maximum power efficiency of 0.16 Im/w at 11 V were achieved. The CIE coordinates (0.28, 0.47) were corresponded to green color and independent on driving voltage. (c) 2014 Elsevier B.V. All rights reserved.