Silver(I) oxalate, with the chemical formula Ag₂C₂O₄, is a light-sensitive, white to yellowish crystalline powder. It is insoluble in water and most organic solvents but decomposes upon heating or exposure to light, releasing metallic silver, carbon dioxide, and carbon monoxide. Its primary and most significant application is as a precursor for the deposition of high-purity silver films and nanoparticles. This is crucial in the fabrication of conductive electrodes for various optoelectronic devices, including perovskite solar cells (PSCs), organic light-emitting diodes (OLEDs), and flexible electronics. The thermal decomposition of silver oxalate provides a clean, low-temperature route to form conductive silver traces or contacts. It is also explored as an additive or precursor in battery materials to enhance conductivity or form specific electrode components. Due to its light sensitivity and explosive nature when dry, it must be handled with extreme caution, typically stored and shipped wet (e.g., with water or ethanol). Its use is specialized within materials science for advanced manufacturing processes where precise metal deposition is required.