Characterizations of Cuprous Oxide Thin Films Prepared by Sol-Gel Spin Coating Technique with Different Additives for the Photoelectrochemical Solar Cell

Table 1

The energy gap, grain size, thickness, and plane (ℎ𝑘𝑙) of the Cu₂O films.

Samples	Energy gap; (eV)	Grain size; (nm)	Thickness; (nm)	Plane; (ℎ𝑘𝑙)
1	1.85±0.1	104	102	(111), (200)
2	1.90±0.1	83	395	(111), (200)
3	1.75±0.1	90	59	(110), (111), (200)