Issue 45, 2022

Liquid-metal based flexible a-IZTO ultrathin films for electrical and optical applications

Abstract

Amorphous indium zinc tin oxide (a-IZTO) is a kind of transparent conductive oxide (TCO), which can be used in transparent electrodes, transistors, and flexible devices. At present, a key limitation of a-IZTO is the costly vacuum manufacturing technology, and its commercial production is also restricted by the complex raw material preparation process. In this article, we report a liquid metal-based van der Waals (vdW) exfoliation technique by which a-IZTO films with several nanometres thickness are fabricated. The a-IZTO films fabricated in ambient air have a size on the centimeter scale and an optical transmittance of 99.64%; they are also large-area flexible oxide films. In order to illustrate the capabilities of this technology, we fabricated thin film transistors (TFTs) and photodetectors based on a-IZTO films. An a-IZTO thin film transistor (TFT) has an on/off ratio of 106. When the Vds is 5 V, the responsivity, detectivity and external quantum efficiency of an a-IZTO photodetector are 7.57 × 104 A W−1, 4.00 × 1015 Jones and 3.68 × 105%, respectively, exhibiting one of the top performances in this field.

Graphical abstract: Liquid-metal based flexible a-IZTO ultrathin films for electrical and optical applications

Supplementary files

Article information

Article type
Communication
Submitted
19 Aug 2022
Accepted
28 Oct 2022
First published
31 Oct 2022

Nanoscale, 2022,14, 16797-16805

Liquid-metal based flexible a-IZTO ultrathin films for electrical and optical applications

Y. Li, S. Yin, Y. Du, H. Zhang, J. Chen, Z. Wang, S. Wang, Q. Qin, M. Zhou and L. Li, Nanoscale, 2022, 14, 16797 DOI: 10.1039/D2NR04535D

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