coatings Article Effects of Yttrium Doping on a-IGZO Thin Films for Use as a Channel Layer in Thin-Film Transistors Sanghyun Cho 1, Seohan Kim 1, Doyeong Kim 1, Moonsuk Yi 2, Junseok Byun 3,* and Pungkeun Song 1,* 1 Department of Materials Science and Engineering, Pusan National ...