Al-Zn-Sn-O Thin Film Transistors with Top and Bottom Gate Structure for AMOLED. - Doo-Hee Cho; Sang-Hee Ko Park; Shinhyuk Yang; Chunwon Byun; Min Ki Ryu; Jeong-Ik Lee; Chi-Sun Hwang; Sung Min Yoon; Hye Yong Chu; Kyoung-Ik Cho (IEICE Trans. Electron., 2009)