Gettering Effect Induced by Oxygen-Deficient Titanium Oxide in InZnO and InGaZnO Channel Systems for Low-Power Display Applications

Shiang Shiou Yen, Yu Chien Chiu, Chun Hu Cheng, Po Chun Chen, Yu Chen Yeh, Chien Hung Tung, Hsiao Hsuan Hsu, Chun Yen Chang

研究成果: 雜誌貢獻文章

4 引文 斯高帕斯(Scopus)


This paper reported the IGZO and IZO thin-film transistor (TFT) with titanium-oxide semiconductor as channel capping layer. After the TiO Gettering process, the oxygen vacancies in IGZO channel were successfully modified to maximize the carrier concentration and device mobility. The superior transfer characteristics included a low sub-threshold swing of 79 mV/decade, a very high mobility of 68 cm2 V·s, and good on/off-current ratio of 5.61×106. However, the IZO channel with nano-crystallized grains and without Ga atom doping showed unfavorable transistor characteristics. In addition to apparently degraded transfer properties, the spontaneously oxidized TiOx capping layer also lead to an increase of channel parasitic resistance that limits the output driving current. Therefore, we believe that the existence of Ga-O bonds among IGZO channel would be helpful to stabilize oxygen diffusion behavior and electric structure during Gettering process.

頁(從 - 到)219-223
期刊Journal of Display Technology
出版狀態已發佈 - 2016 三月


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering