Effects of Ambient Gases on the Electrical Performance of Solution-Processed C8-BTBT Thin-Film Transistors

(Color online) (a) A schematic diagram of the device structure. (b) The molecular structures of the C8-BTBT, molybdenum oxide, and PMMA used in the experiment. (c) AFM surface morphology image of the C8-BTBT film indicating a small RMS value of 2.08？nm. (d) Test procedures used to measure the electrical performance characteristics of 70？units of each device type (high vacuum, nitrogen atmosphere, oxygen atmosphere, and air atmosphere