| 主权项 |
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 Ar8 and Ar9 independently of each other denote a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group, X3 and X4 independently of each other denote O, S, C(═O), S(═O), SO2, C(R1)(R2), Si(R1)(R2), N(R1), B(R1), P(R1) or P(═O)(R1), X5 and X6 independently of each other denote N, B, P, C(R1) or Si(R1), R1 and R2 are independently of each other identical or different groups selected from H, halogen, —CN, —NC, —NCO, —NCS, —OCN,
—SCN, —C(═O)NR0R00, —C(═O)X, —C(═O)R0, —NH2, —NR0R00,—SH, —SR0, —SO3H, —SO2R0, —OH, —NO2, —CF3, —SF5, optionally substituted silyl, or carbyl or hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally includes one or more hetero atoms, and optionally the groups R1 and R2 form a spiro group with the fluorene moiety to which they are attached, X is halogen, R0 and R00 are independently of each other H or an optionally substituted carbyl or hydrocarbyl group optionally including one or more hetero atoms, X3 and Ar9 are bonded to adjacent carbon atoms in the aromatic ring of Ar9, X4 and Ar8 are bonded to adjacent carbon atoms in the aromatic ring of Ar9, X5 and Ar9 are bonded to adjacent atoms in the aromatic ring of Ar8, and X6 and Ar8 are bonded to adjacent atoms in the aromatic ring of Ar9, Ar′ and Ar″ denote an aromatic hydrocarbon group or heterocyclic group; one of X7 and X8 denotes C(═O) or C(R1)(R2) and the other denotes O, S, C(═O), S(═O), SO2, C(R1)(R2), Si(R1)(R2), N(R1), B(R1), P(R1) or P(═O)(R1), Q is X9, X9—X10 or X11═X12, X9 and X10 denote independently of each other O, S, C(═O), S(═O), SO2, C(R1)(R2), Si(R1)(R2), N(R1), B(R1), P(R1) or P(═O)(R1), X11 and X12 denote independently of each other N, B, P, C(R1) or Si(R1), Z denotes —CR1═CR2— or —C≡C—, z is 0 or 1, R1 is as defined above, R2 is as defined above, M0 is in case of multiple occurrence independently of one another an aromatic, heteroaromatic or non-aromatic ring system having 2 to 40 C atoms, which is unsubstituted or substituted with one or more identical or different groups R1, K1, K2 and Y are in case of multiple occurrence independently of one another a bridging group forming a cyclic system with M, selected from B(R1), C(R1)2, Si(R1)2, C═O, C═S, C═Se, C═Te, C═NR1, C═C(R1)2, O, S, S═O, SO2, S(R1)2, N(R1), P(R1), P(═O)R1, P(═S)R1, C≡C or a combination or one, two, three or four of these groups, 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 R1, R1 is as defined above, 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. |
