Ink composition, metal thin film prepared using the same and method of preparing the same

A method of preparing an ink composition, comprising:

• preparing a reactive solution by dispersing gold-containing complex compound represented by the following Formula 1 (L and L′ are at least one selected from a group consisting of diolefin and derivatives thereof, and X is at least one selected from a group consisting of chlorine (Cl), bromine (Br), and iodine (I), where m=an integer of 1˜10, n=an integer of 1˜10, o=an integer of 0˜10, and p=an integer of 0˜10) in a solvent;
• agitating the reactive solution to form a reactant;
• and
• washing and filtering the reactant to obtain products.
• AumLnL′oXp Formula 1

A method of preparing a metal thin film, comprising:

• applying ink composition including gold-containing complex compound represented by the following Formula 1 (L and L′ are at least one selected from a group consisting of diolefin and derivatives thereof, and X is at least one selected from a group consisting of chlorine (Cl), bromine (Br), and iodine (I), where m=an integer of 1˜10, n=an integer of 1˜10, o=an integer of 0˜10, and p=an integer of 0˜10) and a solvent to a substrate;
• and
• heat-treating the ink composition.
• AumLnL′oXp Formula 1