Abstract
Zinc tin oxide (ZTO) films were fabricated on SiO2/Si substrate as a function of Mg concentration (the ratio of 3 to 10 atomic%) using a spin-coating process. For the characterization of thin film transistors (TFTs), Zn0.3Sn0.7O channel TFT exhibited a higher on/off ratio compared to Zn0.5 Sn0.5O channel TFT because the higher Sn concentration can induce more charge carriers. 3 atomic% Mg incorporated Zn0.3Sn0.7O channel TFTs showed stable electrical performances such as Ion/off ∼ 1×107, μsat = 1.40 cm2 V-1 s-1, and S = 0.39 V/decade. However, 10 atomic% Mg incorporated Zn0.3Sn0.7O channel TFTs deteriorated their electrical performances due to Mg segregation. The Mg incorporated Zn0.3Sn0.7O channel TFTs effectively suppress off-current and threshold voltage change during positive gate bias stress due to their strong bonding with oxygen.
| Original language | English |
|---|---|
| Pages (from-to) | 1741-1745 |
| Number of pages | 5 |
| Journal | Journal of Nanoscience and Nanotechnology |
| Volume | 13 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2013 |
Keywords
- Magnesium zinc tin oxide
- Oxide semiconductor
- Sol-gel
- Thin film transistor