摘要 |
Electroluminescent device comprising in this order
(a) an anode
(b) a hole transporting layer
(c) a light-emitting layer
(d) optionally an electron transporting layer and
(e) a cathode
and a light-emitting substance, wherein the light-emitting substance is a diketopyrrolopyrrole represented by formula I or formula III
wherein R 1 and R 2 , independently from each other, stand for C 1 -C 25 -alkyl, allyl which can be substituted one to three times with C 1 -C 3 alkyl or Ar 3 , or -CR 3 R 4 -(CH 2 ) m -Ar 3 , wherein R 3 and R 4 independently from each other stand for hydrogen or C 1 -C 4 alkyl, or phenyl which can be substituted one to three times with C 1 -C 3 alkyl,
Ar 3 stands for phenyl or 1- or 2-naphthyl which can be substituted one to three times with C 1 -C 8 alkyl, C 1 -C 8 alkoxy, halogen or phenyl, which can be substituted with C 1 -C 8 alkyl or C 1 -C 8 alkoxy one to three times, and m stands for 0, 1, 2, 3 or 4,
Ar 1 and Ar 2 , independently from each other, stand for
wherein
R 5 , R 6 and R 7 , independently from each other, stand for hydrogen, cyano, halogen, C 1 -C 6 alkyl, -NR 8 R 9 , -OR 10 , -S(O) n R 8 , -Se(O) n R 8 , or phenyl, which can be substituted one to three times with C 1 -C 8 alkyl or C 1 -C 8 alkoxy,
wherein R 8 and R 9 , independently from each other, stand for hydrogen, phenyl, C 1 -C 25 -alkyl, C 5 -C 12 -cycloalkyl, -CR 3 R 4 -(CH 2 ) m -Ph, R 10 , wherein R 10 stands for C 6 -C 24 -aryl, or a saturated or unsaturated heterocyclic radical comprising five to seven ring atoms,
wherein the ring consists of carbon atoms and one to three hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, wherein Ph, the aryl and heterocyclic radical can be substituted one to three times with C 1 -C 8 alkyl, C 1 -C 8 alkoxy, or halogen, or R 8 and R 9 stand for -C(O)R 10 , wherein R 11 can be C 1 -C 25 -alkyl, C 5 -C 12 -cycloalkyl, R 10 , -OR 12 or -NR 13 R 14 , wherein R 12 , R 13 , and R 14 stand for C 1 -C 25 -alkyl, C 5 -C 12 -cycloalkyl, C 6 -C 24 -aryl,
or
a saturated or unsaturated heterocyclic radical comprising five to seven ring atoms, wherein the ring consists of carbon atoms and one to three hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, wherein the aryl and heterocyclic radical can be substituted one to three times with C 1 -C 8 alkyl or C 1 -C 8 alkoxy, or -NR 8 R 9 stands for a five- or sixmembered heterocyclic radical in which R 8 and R 9 together stand for tetramethylene, pentamethylene, -CH 2 -CH 2 -O-CH 2 -CH 2 -, or -CH 2 -CH 2 -NR 5 -CH 2 -CH 2 -, preferably -CH 2 -CH 2 -O-CH 2 -CH 2 -, and n stands for 0, 1, 2 or 3, and wherein Z stands for a diradical selected from the group consisting of a single bond, C 2 -C 6 alkylene, which can be substituted one to three times with C 1 -C 4 alkyl, C 1 -C 4 alkoxy, or phenyl, phenylene or naphthylene, processes for the preparation of compounds I, its uses and compositions comprising the compounds I and/or III.
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