Table 3. Optical and electrical transport features of the spray-pyrolyzed pure and Nb:W co-doped SnO₂ films.

Sample ID	Band gap (eV)	Carrier concentration (n)	Resistivity (ρ)	Mobility (μ)	Sheet resistance Ω □−1
					Hall effect	Four probe
TO	3.91	3.57 × 1019	1.16 × 10−2	15.04	132	118
WTO	3.65	3.88 × 1020	3.21 × 10−3	6.11	62	65
NWTO1	3.56	2.43 × 1020	4.29 × 10−3	6.28	83	75
NWTO2	3.50	1.82 × 1020	8.50 × 10−3	6.49	173	72