White LED-assisted low-temperature sintering of paper electric circuits and their electronic application

摘要: Abstract Inkjet printed electronic devices, as a new kind of thin film electronics, have got much attention due to their advantages fast manufacturing, flexibility and cost saving. The challenge this field is efficient sintering at low temperature, which necessary for the wearable flexible application, especially on heat-sensitive substrates, e.g. papers plastics. To solve cracking phenomenon high-temperature common problem photo paper substrate, we proposed an effective multiple-step method combining acetone washing with LED-assisted low-temperature heating. temperature was reduced dramatically through using method, resistivity silver tracks treated 70 °C equal that by thermal 150 °C. Thus, broke bottleneck resulting from long conductive tracks. mechanisms capping agents' removal were investigated X-ray photoelectron spectra (XPS). Besides, size nanoparticles (NPs) well controlled adjusting dropping speed solution, helped improve electrical performance ink. surface properties including morphologic roughness, bonding strength also investigated. By inkjet-printing post-processing showed exemplary applications electronics fast-manufactured, no-mask-required, pattern-programmable precisely-controlled characteristics. Our results provide simple convenient approach developing high-performance thin-film devices based inkjet printing technology.