High-Performance Full-Photolithographic Top-Contact Conformable Organic Transistors for Soft Electronics.

Organic thin-film transistors (OTFTs) are identified to be the most promising candidate for next-generation wearable and implantable electronics because of their unique advantages including their flexibility, low cost, long-term biocompatibility, and simple packaging. However, commercialization of organic transistors remains an enormous challenge due to their low mobility and lack of scalable strategy for high-precise soft devices. Here, a novel photolithography fabrication strategy is proposed, which is completely compatible with various commercial organic semiconductor materials, for the first demonstration of the fully photolithographic top-contact conformable OTFTs with the device density as high as 1523 transistors cm-2. Excellent electrical and mechanical properties with device yield as high as 100%, field-effect mobility up to 1-2 cm2 V-1 s-1, and outstanding conformability are shown. This work provides a new strategy that can fully maximize the advantages of organic materials and photolithography technology, showing a great prospect in the development of high-performance, high-precise organic devices toward the commercialized and industrialized soft electronic products.