Organic donor-acceptor molecules for effective thermally activated delayed narrow fluorescence fluorescence for use in opto-electronic devices

摘要

The invention relates to novel purely organic emitter molecules according to the formula II and their use in optoelectronic devices, in particular in organic light emitting diodes (OLEDs) where Q1 to Q6 are independently selected from the group consisting of the radicals H, alkyl, alkenyl, alkynyl, Cycloalkyl and aryl, each group Q1 to Q6 independently being either unsubstituted or substituted by one or more of F, Cl, Br, alkoxyl, thioalkoxyl, amine, silane, phosphane, borane or aryl; R1 to R4 are independently selected from the group consisting of the radicals H, alkyl, alkenyl, alkynyl, cycloalkyl, alkoxyl O-R ', thioalkoxyl S-R', amine N-R'R ", phosphane P-R'R", silane SiR'R " R '", borane BR'R", fluorine, chlorine, bromine and a group Akr, where R', R "and R '" independently of one another represent a straight-chain or branched (CC) -alkyl, (CC) -alkene, (CC ) -Alkyne, (CC) -cycloalkyl or a 5- Mean that at least one of the positions R1, R2, R3 or R4 is Akr, where Akr has a structure according to formula III: wherein # denotes the point over which the group Akr is linked to the ring R9 to R16 are independently selected from the group consisting of H, (CC) alkyl, (CC) alkenyl, (CC) alkynyl, (CC) cycloalkyl, alkoxy O-R ', Amine N-R'R ", phosphine PR'R", silane SiR'R "R '", borane BR'R ", fluorine, chlorine, bromine and aryl, wherein the radicals R', R" and R '"as Q7 and Q8 are defined as Q1 to Q6 and may be linked together to form a ring system, R5 to R8 are independently selected from the group consisting of H, CH, CN, COR ', CO ( OR '), CO (NR'R "), SOR', SO (OR '), SOR', CF, CFR ', wherein R' and R" are defined as R1 to R4, wherein at least one of R5 to R8 nich t H or CHist.