title: Electrical properties of solution-deposited ZnO thin-film transistors by low-temperature annealing.
abstract: Flexible oxide thin-film transistors (Oxide-TFTs) have emerged as next generation transistors because of their applicability in electronic device. In particular, the major driving force behind solution-processed zinc oxide film research is its prospective use in printing for electronics. A low-temperature process to improve the performance of solution-processed n-channel ZnO thin-film transistors (TFTs) fabricated via spin-coating and inkjet-printing is introduced here. ZnO nanoparticles were synthesized using a facile sonochemical method that was slightly modified based on a previously reported method. The influence of the annealing atmosphere on both nanoparticle-based TFT devices fabricated via spin-coating and those created via inkjet printing was investigated. For the inkjet-printed TFTs, the characteristics were improved significantly at an annealing temperature of 150 degrees C. The field effect mobility, V(th), and the on/off current ratios were 3.03 cm2/Vs, -3.3 V, and 10(4), respectively. These results indicate that annealing at 150 degrees C 1 h is sufficient to obtain a mobility (μ(sat)) as high as 3.03 cm2/Vs. Also, the active layer of the solution-based ZnO nanoparticles allowed the production of high-performance TFTs for low-cost, large-area electronics and flexible devices.
authors.forename: Chul
authors.initials: C
authors.lastname: Lim
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Oh
authors.forename: Jae Bon
authors.initials: JB
authors.lastname: Koo
authors.forename: Chan Woo
authors.initials: CW
authors.lastname: Park
authors.forename: Soon-Won
authors.initials: SW
authors.lastname: Jung
authors.forename: Bock Soon
authors.initials: BS
authors.lastname: Na
authors.forename: Hye Yong
authors.initials: HY
authors.lastname: Chu
mesh_terms: D003080:Cold Temperature; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D011327:Printing; D014173:Transistors, Electronic; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D015034:Zinc Oxide