I want to fabricate ZnO thin film on a flexible PEN substrate using RF sputtering technique. Is there any specific target material to be used for getting ZnO film?
Using a metallic Zn target and doind reactive sputtering in Ar+O2, or 100 % O2 sputtering gas ambient is the best option. It is cheapest and most reliable option compared oxide powder targets, which are costly, become oxygen deficient after a couple of sputtering runs, and also tend to crACK.