ORGANIC MOLECULES HAVING TWO NON-CONJUGATED BRIDGES BETWEEN A DONOR AND AN ACCEPTOR FOR EFFECTIVE THERMALLY ACTIVATED DELAYED FLUORESCENCE FOR USE IN OPTOELECTRONIC DEVICES

摘要

The invention relates to purely organic emitter molecules of a new type according to formula 1 and to the use thereof in optoelectronic devices, in particular in organic light-emitting diodes (OLEDs), comprising donor D: an aromatic or heteroaromatic chemical group on which the HOMO is located and which optionally has at least one substitution; acceptor A: an aromatic or heteroaromatic chemical group on which the LUMO is located and which optionally has at least one substitution; bridge B1, bridge B2: organic groups that link the donor D and the acceptor A in a non-conjugated manner; wherein in particular the energy difference AE(S1-T1) between the lowest excited singlet (S1) state of the organic emitter molecule and the triplet (T1) state of the organic emitter molecule lying thereunder is less than 2 000 cm-1.