Photoresponse Analysis of All-Inkjet-Printed Single-Walled Carbon Nanotube Thin-Film Transistors for Flexible Light-Insensitive Transparent Circuit Applications

We report daylight-stable, transparent, and flexible single-walled carbon nanotube thin-film transistors (SWCNT TFTs) using an all-inkjet printing process. Although most of the previous reports classified SWCNT TFTs as photodetectors, we demonstrated that SWCNT films actually show two different types of photoresponses depending on the power levels of light sources. The electrical characteristics of SWCNT TFTs show no significant change under daily illumination conditions such as halogen lamps and sunlight, while under high-power laser illumination, they change as reported in the previous results. In addition, the low -temperature solution process of the SWCNT with its one-dimensional nature allows us to realize highly transparent and flexible TFTs and logic circuits on plastic substrates. Our result will provide new insights into utilizing SWCNT TFTs for light -insensitive transparent and flexible electronic applications.

Automated summary

We present a study on robust, transparent, and flexible thin-film transistors made of single-walled carbon nanotubes using an all-inkjet printing method. Our findings reveal that these thin-film transistors exhibit different photoresponses based on the power levels of incident light, distinguishing them from previous reports that classified them as photodetectors. Furthermore, these transistors show stability under daily illumination conditions, making them suitable for light-insensitive transparent and flexible electronic applications.