Method for producing tris-ortho-metallated complexes and use of such complexes in oleds

摘要

Process for preparing tris-ortho-metallated iridium complexes of the formula (I) where R¹, R², R³, R⁴, R⁵, R⁶ and X have the meanings given in the description, Ir complexes which can be prepared by the process of the invention, the use of the Ir complexes as emitter molecule in organic light-emitting diodes (OLEDs), a light-emitting layer comprising the Ir complexes, an OLED comprising this light-emitting layer and an apparatus comprising an OLED according to the present invention.