Effect of the Substrate Movement on the Optical Properties of ZnO Thin Films Deposited by Ultrasonic Spray Pyrolysis

Table 1

Film thickness 𝑡 (nm) and comparison of 𝐸_𝑔 (eV) optical band gap values from inflexion point equation and photoluminescence (PL) analysis for ZnO thin films labelled as ZO1 for linear moved, ZO2 for fixed, and ZO3 for rotated substrate.

Sample		Inflexion point equation	PL analysis
	𝑡	𝐸𝑔	𝜆1	𝐸𝑔	𝜆2
	(nm)	(eV)	(nm)	(eV)	(nm)
ZO1	2560	3.200	393.08	3.157	401.65
ZO2	2435	3.188	393.09	3.156	402.79
ZO3	2130	3.205	388.30	3.195	397.90