The Variation of Optical Band Gap for ZnO:In Films Prepared by Sol-Gel Technique

Table 1

Film thickness, refractive index, and band gap of ZnO:In films with different doping concentrations.

In concentration (at.%)	0	1	2	3	5
Film thickness (nm)	214	232	244	241	214
Refractive index	1.176	1.138	1.105	1.095	1.170
Band gap (eV)	3.157	3.216	3.202	3.197	3.151