Patent ID: 8241764
Filing Date: 2012-08-14
Classification: C09K,H01L

Abstract:
1. An organic light-emitting diode comprising i) an anode A; ii) a hole-conducting layer B formed from at least one hole-conducting material; iii) a light-emitting layer C; iv) an electron-conducting layer D; and v) a cathode E; where the layers A, B, C, D and E are arranged in the aforementioned sequence and one or more further layers may be arranged between layers A and B, B and C, C and D and/or D and E, wherein the light-emitting layer C comprises at least one hole-conducting material CA and at least one phosphorescence emitter CB, wherein a hole-blocking layer formed from at least one hole blocker material and/or exciton blocker material is present between the light-emitting layer C and the electron-conducting layer D in direct contact to the light-emitting layer C, wherein at least one compound of formula III is present in the hole-blocking layer as hole blocker material and/or excition blocker material, in which: X is NR R R R R q,r are each independently 0, 1, 2 or 3; where, in the case when q or r is 0, all substitutable positions of the aryl radical are substituted by hydrogen, where the radicals and indices in the group of the formula (c) X′″, R