Format

Send to

Choose Destination
Sci Rep. 2018 Sep 17;8(1):13905. doi: 10.1038/s41598-018-32233-4.

Effects of Unusual Gate Current on the Electrical Properties of Oxide Thin-Film Transistors.

Author information

1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
2
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea. younskim@snu.ac.kr.
3
Advanced Institute of Convergence Technology, 145 Gwanggyo-ro, Yeongtong-gu, Suwon, 16229, Republic of Korea. younskim@snu.ac.kr.

Abstract

The wide research and development on oxide thin-film transistors (TFTs) have led to considerable changes in mainstream technology in various electronic applications. Up to now, much research has been focusing on enhancing the performance of oxide TFTs and simplifying fabricating process. At the stage of research and development in the oxide TFT, unexpectedly high gate current phenomena have been continuously reported by several groups, but the origins have not been yet studied in detail. The unusual gate current interferes with the conductance of the oxide TFT, which makes it difficult to interpret the performance of the TFT. Here we present the origin and control factors of the unconventional gate currents flow in the oxide TFT. The gate current is due to the conduction of electrons through trap sites in insulators, and the current is sophisticatedly controlled by the structural factors of TFT. Furthermore, the gate current flows only in one direction due to the charge state of the oxide semiconductor at the interface with the insulator. We also demonstrate that the vertical current path functions as a diode unit can protect the TFT from unintended gate electrostatic shock.

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center