Wide-bandgap high-mobility ZnO thin-film transistors produced at room temperature.

We report high-perfomance ZnO thin-film transistor (ZnO-TFT) fabricated by rf magnetron sputtering at room temperature with a bottom gate configuration. The ZnO-TFT operates in the enhancement mode with a threshold voltage of 19 V, a saturation mobility of 27 cm2/V s, a gate voltage swing of 1.39 V/decade and an on/off ratio of 3 × 105. The ZnO-TFT presents an average optical transmission (including the glass substrate) of 80% in the visible part of the spectrum. The combination o f transparency, high mobility, and room-temperature processing makes the ZnO-TFT a very promising low-cost optoelectronic device for the next generation of invisible and flexible electronics. [ABSTRACT FROM AUTHOR]