DataVXACS Applied Electronic MaterialsPaper
journal article·2024-12-24

Vacuum-Free Liquid-Metal-Printed 2D Semiconducting Tin Dioxide: The Effect of Annealing

Nitu Syed, Chung Kim Nguyen, Ali Zavabeti, Mei Xian Low, Xiaotian Wei, Vaishnavi Krishnamurthi, Mehmood Irfan, Wendy S. L. Lee, Ngoc M. H. Duong, Anh Thai Nguyen, Philipp Reineck, Lei Bao, Ann Roberts, Torben Daeneke

ACS Applied Electronic Materials· Volume 6· Issue 12
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Source abstract

Abstract

Thin film transistors (TFTs) offer unparalleled opportunities for the fabrication of multifunctional electronic and optoelectronic devices. In this work, we report a vacuum-free liquid metal exfoliation technique for rapidly printing ∼2 nm-thick layer of oxide from molten tin. We explore the effect of rapid thermal annealing at 450 °C on the stoichiometry, morphology, and crystal structure of the resulting tin oxide nanosheets. The annealed samples exhibit a dominant SnO 2 phase and a high degree of transparency (>99%) in the visible spectra. Field-effect transistors based on the two-dimensional (2D) SnO 2 films show typical n -channel conduction with a field-effect mobility of ∼7.5 cm 2 V –1 s –1 . Photodetectors utilizing annealed tin dioxide demonstrate significant improvement in photoresponsivity reaching a value of 5.2 × 10 3 A W –1 compared to that found in an unannealed sample at an ultraviolet wavelength of 285 nm. We demonstrate that the improvement in device performance is due to nanocrystalline changes within the oxide layers during the annealing process. This work offers a straightforward and ambient air-compatible method for depositing ultrathin, large-area semiconducting oxides as potential candidates for enabling emerging applications in transparent nanoelectronics and optoelectronics.
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Research context

NanomaterialsElectronic materialsMaterials processing

OpenAlex topics: ZnO doping and properties · Gas Sensing Nanomaterials and Sensors · Transition Metal Oxide Nanomaterials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics, ARC Centre of Excellence for Transformative Meta-Optical Systems, The University of Melbourne, Melbourne, Victoria 3010, Australia

School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia

Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia

School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, New South Wales 2033, Australia

CSIRO Manufacturing, West Lindfield, New South Wales 2070, Australia

Department of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam

Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam

ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, Melbourne, Victoria 3001, Australia

Funding

Australian Research Council · RMIT University · University of Melbourne · Ho Chi Minh City University of Technology and Education · ARC Centre of Excellence for Transformative Meta-Optical Systems

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