Browsing by Author "Du, Bo-Wei"

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Controllable Ink-Jet Printing Technique on Various Channel Width Designs Toward Zinc Oxide-based Thin Film Transistor
(2016)
Wang, Cheng-Jyun
;
Ko, Fu-Hsiang
;
You, Hsin-Chiang
;
Du, Bo-Wei
;
材料科學與工程學系
Ink-jet printed (IJP) thin-film transistor (TFT) electronics employing solution processed materials is considered to be the key technique to achieve mask-less, low-cost, large-area, and low temperature fabrication systems. We propose an approach for a direct printing highly transparent conducting oxide material of zinc oxide (ZnO) which the use of semiconductor layer with different transistor channel widths without any photolithography process defined. In this work, we describe the ink-jet printing ZnO TFT with three-types channel widths, and electrical characteristics with low voltage operation, high performance of switch on/off state and low temperature fabrication (200 similar to 300 degrees C). These printed TFT thus represent an uniquely attractive path for realizing high flexibility printed electronics.
Eco-Friendly and Biodegradable Biopolymer Chitosan/Y2O3 Composite Materials in Flexible Organic Thin-Film Transistors
(2017-09-01)
Du, Bo-Wei
;
Hu, Shao-Ying
;
Singh, Ranjodh
;
Tsai, Tsung-Tso
;
Lin, Ching-Chang
The waste from semiconductor manufacturing processes causes serious pollution to the environment. In this work, a non-toxic material was developed under room temperature conditions for the fabrication of green electronics. Flexible organic thin-film transistors (OTFTs) on plastic substrates are increasingly in demand due to their high visible transmission and small size for use as displays and wearable devices. This work investigates and analyzes the structured formation of aqueous solutions of the non-toxic and biodegradable biopolymer, chitosan, blended with high-k-value, non-toxic, and biocompatible Y2O3 nanoparticles. Chitosan thin films blended with Y2O3 nanoparticles were adopted as the gate dielectric thin film in OTFTs, and an improvement in the dielectric properties and pinholes was observed. Meanwhile, the on/off current ratio was increased by 100 times, and a low leakage current was observed. In general, the blended chitosan/Y2O3 thin films used as the gate dielectric of OTFTs are non-toxic, environmentally friendly, and operate at low voltages. These OTFTs can be used on surfaces with different curvature radii because of their flexibility.