Micron-Scale Resolution Image Sensor Based on Flexible Organic Thin Film Transistor Arrays via Femtosecond Laser Processing

Arrays of flexible organic thin-film transistors (OTFTs) are the prerequisite to realize commercialization of flexible electronics. However, photolithography and print techniques are uneasy to combine high performance, high integration density, and compatibility with flexible substrates to fabricate OTFT arrays. In this work, OTFT arrays with high resolution, flexibility and process convenience are patterned by femtosecond laser (fs-laser). 1 cm
²
of area can accommodate up to 6250 transistors with sharp edges and short channel lengths by selective processing. Furthermore, micron-scale resolution flexible image sensor with integration potential were verified. Hence, these results will impel the development of flexible wearable electronic devices in the future.