Formulations comprising ammoniacal hydroxozinc compounds
View Patent ↗The invention relates to ammoniacal formulations comprising a) at least one hydroxozinc compound and b) at least one compound of an element of the 3 rd primary group, to the use thereof, to a method using said formulations to produce layers comprising ZnO and to electronic components produced using same.
1. An ammoniacal formulation, comprising:
a) a hydroxozinc compound, and
b) at least two compounds of main group 3 elements
wherein the hydroxozinc compound is Zn(OH) x (NH 3 ) y (2-x)+ , where 1≤x≤2 and 1≤v ≤6,
wherein the at least two compounds of the main group 3 elements are a gallium compound and an indium compound, and
wherein the formulation comprises, based on a total amount of zinc and the main group 3 elements, from 65-75 mol % of the hydroxozinc compound, from 25-34 mol % of the gallium compound, and from 1-10 mol % of the indium compound.
2. The formulation according to claim 1 , which is obtained by a process comprising
a) dissolving nitrate salts of zinc and at least two main group 3 elements in a trivalent oxidation state in a solvent,
b) precipitating a hydroxide-containing solid with a hydroxide base,
c) removing the solvent, thereby obtaining a precipitate, and
d) taking up the precipitate in ammoniacal water.
3. A process for producing a ZnO-containing layer, the process comprising:
applying the formulation according to claim 1 to a substrate, and
then thermally converting the formulation, thereby obtaining the ZnO-containing layer.
4. A process for producing an electronic component, the process comprising:
employing the formulation according to claim 1 to produce the electronic component.
5. An electronic component, comprising a ZnO-containing layer produced by the process according to claim 3 .
6. The electronic component according to claim 5 , which is a transistor.
7. The electronic component according to claim 5 , which is an optoelectronic component.
8. The electronic component according to claim 5 , which is a sensor.