Abstract
In this study, the effects of indium (In) doping on the properties of zinc tin oxide (ZTO) films are reported. ZTO films were prepared by RF magnetron sputtering followed by In layer deposition, for use as the diffusion source. In order to protect the In layer from peeling, a second ZTO film was deposited on the In film. The annealing at 400°C for 30min was carried out to diffuse In atoms into the ZTO films. The structural, optical, and elemental properties of the annealed ZTO/In/ZTO films were investigated by X-ray diffraction, UV/vis spectrophotometry, and X-ray photoluminescence spectroscopy, respectively. The ZTO transparent thin film transistors employing the ZTO/In/ZTO films as the source/drain were prepared, and the effects of the In doped source/drain on the threshold voltage and mobility were characterized and analyzed.
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