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Updated: Mar 7, 2026

Fabrication of Spatially Confined Complex Oxides

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

A solution-processed quaternary oxide system obtained at low-temperature using a vertical diffusion technique.

Seokhyun Yoon¹, Si Joon Kim¹, Young Jun Tak¹

¹School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.

Scientific Reports

|February 24, 2017

Summary

This summary is machine-generated.

A new vertical diffusion technique (VDT) enables low-temperature fabrication of uniform Indium-Gallium-Zinc-Oxide (IGZO) thin-film transistors (TFTs). This method enhances device performance and stability by reducing oxygen vacancies.

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Last Updated: Mar 7, 2026

Fabrication of Spatially Confined Complex Oxides

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Published on: July 1, 2013

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Published on: June 13, 2018

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

Area of Science:

Materials Science
Electronics Engineering
Semiconductor Physics

Background:

Solution-processed thin-film transistors (TFTs) are crucial for flexible electronics.
Indium-Gallium-Zinc-Oxide (IGZO) is a promising semiconductor material for TFTs.
Low annealing temperatures are desirable for cost-effective and energy-efficient fabrication.

Purpose of the Study:

To develop a low-temperature fabrication method for solution-processed IGZO TFTs.
To investigate the effect of a novel vertical diffusion technique (VDT) on IGZO film properties.
To enhance the performance and stability of IGZO TFTs.

Main Methods:

Fabrication of quaternary IGZO thin films using a vertical diffusion technique (VDT).
VDT involves consecutive spin-coating of binary/ternary oxide layers followed by simultaneous annealing.
Annealing temperature was maintained at a low 280°C.

Main Results:

VDT enabled the formation of uniform and dense quaternary oxide layers at low temperatures.
VDT-processed IGZO films exhibited a higher density of metal-oxide bonds and fewer oxygen vacancies compared to conventional IGZO and ternary In-Zn-O (IZO) films.
VDT IGZO TFTs showed a threefold increase in field-effect mobility and improved stability under positive bias stress compared to IZO TFTs.

Conclusions:

The VDT is an effective and simple method for fabricating uniform quaternary oxide semiconductor layers at reduced processing temperatures.
VDT offers a viable pathway for low-cost, high-performance IGZO TFT production.
The reduction in oxygen vacancies via VDT is key to improved TFT performance and stability.