Nanomaterials (May 2020)

Recent Advances of Solution-Processed Heterojunction Oxide Thin-Film Transistors

  • Yanwei Li,
  • Chun Zhao,
  • Deliang Zhu,
  • Peijiang Cao,
  • Shun Han,
  • Youming Lu,
  • Ming Fang,
  • Wenjun Liu,
  • Wangying Xu

DOI
https://doi.org/10.3390/nano10050965
Journal volume & issue
Vol. 10, no. 5
p. 965

Abstract

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Thin-film transistors (TFTs) made of metal oxide semiconductors are now increasingly used in flat-panel displays. Metal oxides are mainly fabricated via vacuum-based technologies, but solution approaches are of great interest due to the advantages of low-cost and high-throughput manufacturing. Unfortunately, solution-processed oxide TFTs suffer from relatively poor electrical performance, hindering further development. Recent studies suggest that this issue could be solved by introducing a novel heterojunction strategy. This article reviews the recent advances in solution-processed heterojunction oxide TFTs, with a specific focus on the latest developments over the past five years. Two of the most prominent advantages of heterostructure oxide TFTs are discussed, namely electrical-property modulation and mobility enhancement by forming 2D electron gas. It is expected that this review will manifest the strong potential of solution-based heterojunction oxide TFTs towards high performance and large-scale electronics.

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