Electrochromic Devices Based on Porous Tungsten Oxide Thin Films

Table 1

The lattice parameters of WO₃ EC layer prepared at 400, 500, and 600°C and the lattice parameters after lithiating the sample at +2.0 V.

S. No.	Sample name	Coloration voltage	Lattice parameter
			nm			Angle
			𝑎	𝑏	𝑐	𝛽
1	400°C (Hexagonal)	0 V	0.7379±0.0008	—	0.7756±0.0002	—
		+2 V	0.74118±0.0012		0.76152±0.0003
2	500°C (Monoclinic)	0 V	0.7351±0.0002	0.7540±0.0005	0.7712±0.00019	90.3±0.6
		+2 V	0.7397±0.0015	0.7418±0.002	0.7717±0.0002	89.6±10.1
3	600°C (Orthorhombic)	0 V	0.7351±0.0019	0.7566±0.0019	0.7724±0.0021	90.0
		+2 V	0.7445±0.0023	0.7469±0.0058	0.7624±0.0055	90.0