Effect of Silicon Doping on the Electrical Performance of Amorphous SiInZnO Thin-film Transistors

Byeong Hyeon Lee, Dae Hwan Kim, Doo Yong Lee, Sungkyun Park, Sangsig Kim, Hyuck In Kwon, Sang Yeol Lee

Research output: Contribution to journalArticlepeer-review

Abstract

The change of the electrical properties of amorphous SiInZnO thin-film transistors (SIZO TFTs) depending on Si concentration have been investigated. As the Si content increased from 1 to 3 wt%, the electrical properties are systematically degraded, such as field-effect mobility from 19.86 to 11.16 cm2 V−1 s−1. This change in properties has been found to deteriorate the SIZO network when Si content is highly added. In order to analyze the change of the electrical properties of SIZO depending on Si concentration, low frequency noise method and X-ray photoelectron spectroscopy analysis are adopted to investigate trap states in energy bandgap and oxygen vacancies of SIZO system. As a result, it was found that doping with a large amount of Si destabilizes the SIZO network, resulting in degrading electrical properties.

Original languageEnglish
Pages (from-to)133-139
Number of pages7
JournalTransactions on Electrical and Electronic Materials
Volume22
Issue number2
DOIs
Publication statusPublished - 2021 Apr

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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