Materials for electroluminescent devices

Abstract

Materials containing one or more borazine rings are employed as materials for electroluminescent devices. The compounds have molecular structures represented by the following formula: in which R1-R6 are independently a metal; a whole or part of an optionally substituted borazine ring; hydrogen; halogen; hydroxyl; optionally substituted alkyl, cycloalkyl, aryl, acyl, alkoxy, acyloxy, amino, acylamino, aralkyl, cyano, carboxyl, thio, vinyl, styryl, aminocarbonyl, carbamoyl, aryloxycarbonyl, phenoxycarbonyl, or alkoxycarbonyl, as well as recognized donor and acceptor groups. The compounds have high thermal stability as well as hole and electron mobilities.

Description

technical field

[0001] The present invention relates to new electroluminescence (EL) devices, including organic and polymer light emitting devices (OLEDs and PLEDs), which emit light in the ultraviolet or visible region. More specifically, the present invention relates to the use of borazine-containing materials in one or more layers of EL devices OLEDs and PLEDs. These layers include hole injection layers, hole transport layers, electron injection layers, electron transport layers, emissive layers containing single emitters or hosts with one or more emissive dopants, hole blocking layers and / or electron blocking layers. layers, etc., but not limited to these instances. Use of the above materials in EL devices can improve device performance, including, but not limited to, achieving purer colors, higher efficiencies, and lower drive voltages. Further, the present invention also relates to methods for efficiently preparing these materials. Background technique

[0002] The ...

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