Loading...
Please wait, while we are loading the content...
Similar Documents
Remarkable Stability Improvement of ZnO TFT with Al2O3 Gate Insulator by Yttrium Passivation with Spray Pyrolysis
| Content Provider | MDPI |
|---|---|
| Author | Saha, Jewel Kumer Bukke, Ravindra Naik Mude, Narendra Naik Jang, Jin |
| Copyright Year | 2020 |
| Description | We report the impact of yttrium oxide (YOx) passivation on the zinc oxide (ZnO) thin film transistor (TFT) based on Al2O3 gate insulator (GI). The YOx and ZnO films are both deposited by spray pyrolysis at 400 and 350 °C, respectively. The YOx passivated ZnO TFT exhibits high device performance of field effect mobility (μFE) of 35.36 cm2/Vs, threshold voltage (VTH) of 0.49 V and subthreshold swing (SS) of 128.4 mV/dec. The ZnO TFT also exhibits excellent device stabilities, such as negligible threshold voltage shift (∆VTH) of 0.15 V under positive bias temperature stress and zero hysteresis voltage (VH) of ~0 V. YOx protects the channel layer from moisture absorption. On the other hand, the unpassivated ZnO TFT with Al2O3 GI showed inferior bias stability with a high SS when compared to the passivated one. It is found by XPS that Y diffuses into the GI interface, which can reduce the interfacial defects and eliminate the hysteresis of the transfer curve. The improvement of the stability is mainly due to the diffusion of Y into ZnO as well as the ZnO/Al2O3 interface. |
| Starting Page | 976 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano10050976 |
| Journal | Nanomaterials |
| Issue Number | 5 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-05-19 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Coatings and Films Yttrium Oxide (yox) Zno Thin Film Aluminum Oxide (al2o3) Thin Film Transistor Spray Pyrolysis |
| Content Type | Text |
| Resource Type | Article |
