Cyclic phosphazene compounds and use thereof in organic light emitting diodes

摘要

An organic light-emitting diode comprising at least one cyclic phosphazene compound, a light-emitting layer formed from at least one matrix material and at least one emitter material, wherein the at least one matrix material comprises at least one cyclic phosphazene compound, the use of cyclic phosphazene compounds in organic light-emitting diodes and a device selected from the group consisting of stationary visual display units, mobile visual display units and illumination units comprising at least one inventive organic light-emitting diode, and selected cyclic phosphazene compounds and processes for preparing them.

主权项

1. An organic light-emitting diode, comprising at least one cyclic phosphazene compound of formula (I) wherein: n is from 3 to 8; R1 and R2 are each the same or different, and each independently a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted aryloxy, a substituted or unsubstituted alkyloxy, an unsubstituted or substituted cycloalkyl, an unsubstituted or substituted heterocycloalkyl, an unsubstituted or substituted alkenyl, an unsubstituted or substituted alkynyl, an unsubstituted or substituted aralkyl, or F; or R1 and R2 are each independently, in the n groups of formula (I), joined to one another via a bond, a C1-C6-alkylene bridge, an arylene bridge, or a C2-C6-alkenylene bridge, such that R1 and R2 together with the phosphorus atom to which they are joined form a cycle; wherein at least one of R1 and R2 is joined to at least one of the phosphorus atoms of the at least one cyclic phosphazene compound of formula (I) not via an oxygen atom, and wherein the at least one cyclic phosphazene compound is a matrix material in a light-emitting layer, a hole/exciton blocker material, an electron conductor, an electron injection material, an electron/exciton blocker material, a hole injection material and/or a hole conductor.