Table 1.

Electrolyte and deposition conditions of the Cu₂O thin film samples.

Sample Number	Substrate	Lactic Acid Concentration, M	pH	Thickness, μm	Current Density (G)/Potential (P)
13	PC Ag	1.3	12	8.7	−0.38 V (P)
30	PC Ag	3.0	12	1.3	−0.44 V (P)
39	PC Ag	3.0	9	1.3	−0.15 V (P)
40	PC Ag	4.0	12	1.3	−0.43 V (P)
111	(111) Cu	1.3	12	1.0	0.25 mA/cm2 (G)

PC: polycrystal.