Use of the guanidinium cation and light-emitting component
The invention relates to a use of the guanidinium cation and to a light-emitting component. This invention for the first time describes matrix materials and emitters for uses in organic electrochemical light-emitting cells containing a guanidinium cation unit. Guanidinium groups as a cationic system promise a wide electrochemical window and hence stable components. The route to guanidinium systems is described in detail in the literature.
1. An organic electrochemical cell comprising:
a first electrode layer;
a second electrode layer; and
an active organic layer between the first electrode layer and the second electrode layer,
wherein a compound containing a guanidinium cation is present in the active organic layer,
wherein a salt containing the guanidinium cation exhibits the following structural unit:
wherein A x and A x′ are chosen from a substituted or unsubstituted aromatic or heteroaromatic compound,
where Ir is a metal,
wherein
are ligands coordinated to Ir,
wherein each spacer comprises a spacer selected from the group consisting of:
a) aliphatic chains,
b) fluorinated alkyl chains having 1-12 carbon atoms in the chain,
c) unsaturated alkyl chains having 1-20 carbon atoms and conjugated or nonconjugated double bonds,
d) unsaturated alkyl chains having 1-20 carbon atoms and conjugated or nonconjugated triple bonds, also in conjunction with aromatics,
e) a polyethylene glycol, polyethylenediamine, polyester, polyurethane, or polyvinylidenephenylene chain,
f) chains which contain aromatics,
g) mixed variants of a-f, and
wherein R 1 to R 5 comprises a substituent of aliphatic or aromatic structure.
2. The organic electrochemical cell according to claim 1 , wherein the salt containing the guanidinium cation is present in an emitter material of the active organic layer.
3. The organic electrochemical cell according to claim 1 , wherein the salt containing the guanidinium cation is present in a matrix material of the active organic layer.
4. The organic electrochemical cell according to claim 1 , wherein the salt containing the guanidinium cation exhibits the following structural unit:
where substituents R 1 to R 6 are each independently of an aliphatic structure or an aromatic structure.
5. The organic electrochemical cell according to claim 4 , wherein the substituents R 1 to R 6 are each independently:
R=independently H, saturated or unsaturated, branched alkyl radicals, unbranched alkyl radicals, fused alkyl radicals, cyclic alkyl radicals, completely or partially substituted unbranched, branched, fused and/or cyclic alkyl radicals, alkoxy groups, amines, amides, esters, carbonates, aromatics, completely or partially substituted aromatics, heteroaromatic compounds, fused aromatics, completely or partially substituted fused aromatics, heterocycles, completely or partially substituted heterocycles, fused heterocycles, halogens, pseudohalogens.
6. The organic electrochemical cell according to claim 1 , wherein
the spacer comprises an aliphatic chain of —(CH 2 ) n — where n=1-20.
7. The organic electrochemical cell according to claim 1 , wherein the substituent R comprises H, saturated or unsaturated, branched alkyl radicals, unbranched alkyl radicals, fused alkyl radicals, cyclic alkyl radicals, completely or partially substituted unbranched, branched, fused and/or cyclic alkyl radicals, alkoxy groups, amines, amides, esters, carbonates, aromatics, completely or partially substituted aromatics, heteroaromatic compounds, fused aromatics, completely or partially substituted fused aromatics, heterocycles, completely or partially substituted heterocycles, fused heterocycles, halogens, pseudohalogens.