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Highly Stable Indium‐Gallium‐Zinc‐Oxide Thin‐Film Transistors on Deformable Softening Polymer Substrates
Author(s) -
GutierrezHeredia Gerardo,
RodriguezLopez Ovidio,
GarciaSandoval Aldo,
Voit Walter E.
Publication year - 2017
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201700221
Subject(s) - materials science , thin film transistor , flexible electronics , optoelectronics , electronics , transistor , electronic circuit , thin film , nanotechnology , electrical engineering , layer (electronics) , voltage , engineering
Flexible electronics are attracting great interest in healthcare, where devices such as thin‐film transistors (TFTs) on polymer substrates facilitate biomedical applications requiring complex circuits in soft packages. Consequently, a repeatable process to fabricate reliable, stable electronic components on flexible substrates is required. Here, thermoset thiol‐ene/acrylate shape memory polymer (SMP) substrates house indium‐gallium‐zinc‐oxide (IGZO) TFTs and logic circuits: resulting devices exhibit stable behavior after thermal annealing at 250 °C. Fabricated, annealed devices exhibit an average mobility of 15 ± 2.5 cm 2 V −1 s −1 and show stability after bending and soaking in aqueous media. TFTs on SMPs are studied after mechanical bending tests with radii of curvature of 5 mm for 10 4 cycles over a 4 h time period. Other TFTs are soaked in phosphate‐buffered saline solution at 37 °C for 1 week. Logic inverter circuits using IGZO TFTs on SMPs represent the ability to add complex circuitry onto thin film flexible electronics. This technology can enable a new generation of implantable devices for research in healthcare fields.