Metal oxide precursors, coating compositions containing same, and use thereof

1. A liquid coating composition, comprising

at least one metal oxide precursor, which is a coordination complex comprising:

i) at least one metal atom selected from the group consisting of In, Ga, Zn and Sn;

ii) at least one non-photocrosslinkable ligand; and

iii) at least one photocrosslinkable ligand

wherein the at least one photocrosslinkable ligand is selected from the group consisting of an acrylate, a methacrylate and an allyl;

at least one solvent; and

at least one photoinitiator.

2. The liquid coating composition according to claim 1 , wherein the at least one non-photocrosslinkable ligand is selected from the group consisting of an oxo radical, a hydroxyl radical, an alkoxy radical, a nitrate radical and a halide radical.

3. The liquid coating composition according to claim 2 , comprising, as at least one non-photocrosslinkable ligand, at least one oxo radical and at least one alkoxy radical.

4. The liquid coating composition according to claim 1 , comprising, as the at least one non-photocrosslinkable ligand, an oxo, an alkoxy and at least one selected from the group consisting of a nitrate and a halide.

5. The liquid coating composition according to claim 1 , wherein the at least one metal atom is In.

6. A metal oxide precursor having formula:

[In 6 (μ 6 -O)(μ 2 -OR) 12-x Cl 6 (R′) x ] 2−

wherein:

R represents a C 1-10 alkyl,

R′ represents acrylate or methacrylate, and

x represents 1-10.

7. A metal oxide precursor having formula:

[In 6 (μ 6 -O)(μ 2 -OR) 12-x (NO 3 ) 6 (R′) x ] 2−

wherein:

R represents a C 1-10 alkyl,

R′ represents acrylate or methacrylate, and

x represents 1-10.

8. The liquid coating composition according to claim 1 , comprising phenylbis(2,4,6-trimethyl benzoyl)phosphine oxide as the photoinitiator.