Wavy Architecture Thin-Film Transistor for Ultrahigh Resolution Flexible Displays

Amir Nabil Hanna, Arwa Talal Kutbee, Ram Chandra Subedi, Boon Ooi, Muhammad Mustafa Hussain*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

A novel wavy-shaped thin-film-transistor (TFT) architecture, capable of achieving 70% higher drive current per unit chip area when compared with planar conventional TFT architectures, is reported for flexible display application. The transistor, due to its atypical architecture, does not alter the turn-on voltage or the OFF current values, leading to higher performance without compromising static power consumption. The concept behind this architecture is expanding the transistor's width vertically through grooved trenches in a structural layer deposited on a flexible substrate. Operation of zinc oxide (ZnO)-based TFTs is shown down to a bending radius of 5 mm with no degradation in the electrical performance or cracks in the gate stack. Finally, flexible low-power LEDs driven by the respective currents of the novel wavy, and conventional coplanar architectures are demonstrated, where the novel architecture is able to drive the LED at 2 × the output power, 3 versus 1.5 mW, which demonstrates the potential use for ultrahigh resolution displays in an area efficient manner.

Original languageEnglish (US)
Article number1703200
JournalSmall
Volume14
Issue number1
DOIs
StatePublished - Jan 4 2018

Bibliographical note

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • LEDs
  • flexible
  • thin-film transistors
  • wavy
  • zinc oxide

ASJC Scopus subject areas

  • General Chemistry
  • Biotechnology
  • General Materials Science
  • Biomaterials

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