Patent ID: 9093656
Filing Date: 2015-07-28
Classification: B82Y,H01L,Y02E,Y10S

Abstract:
1. An electronic device comprising a cathode, an anode, an emissive layer, and a hole injection layer or charge generation layer deposited between the anode and the emissive layer, wherein the emissive layer comprises at least one quantum dot and at least one organic host material and wherein the ionization potential or the valence band (VB) of the quantum dot is at least 0.3 eV higher than the HOMO of the organic host, and wherein the host material is at least one element selected from a host material having a bigger band gap than the quantum dot, an organic compound having a HOMO at least lower than −5.7 eV, and an organic compound having a LUMO at least lower than −3.0 eV and the host material is a polymer comprising at least one repeating unit of the formula (1), (2), (3) or (4) wherein Ar X X R X is halogen, R X X X X Ar′ and Ar″ denote an aromatic hydrocarbon group or heterocyclic group; one of X Q is X X X Z denotes —CR z is 0 or 1, R R M K J is a linkage group to the polymer, and may also be a substituted or unsubstituted C—C-double or triple bond, a substituted aromatic or heteroaromatic or non-aromatic cyclic ring system having 2 to 40 C atoms, which is unsubstituted or substituted with one or more identical or different groups R R x, y and p are in case of multiple occurrence independently of one another 0 or 1, with the proviso that at least one of x and y is 1, q is an integer ≧1.