液滴沉积制备图案化纳米粒子薄膜

Droplet deposition is an essential process for making micro-patterns using solution processes, especially for the inkjet printing, and it has been widely used in making optoelectronic thin-film devices. Droplet deposition is an extremely complicated and dynamic process, including the spreading, dewetting and drying processes, which can be affected by parameters of the evaporation environment, droplet properties and substrate wettability. It is frequently happened that the droplet deposition produces various micro-patterns. However, these micro-patterns have been long time suffered from the poor uniformity, which therefore impairs the performance of the as-developed optoelectronic devices. Here, taking the solution containing non-volatile nanoparticles as the example, we reviewed systematically both the droplet evaporation modes and three typical convection modes. We also introduced several typical deposited micropatterns, including coffee ring, multi-ring, mountain-like, and other irregular patterns. On the basis, we further discussed recent-developed strategies for making micro-patterns with uniform distribution and their applications in electronic devices. At the end, some perspectives on patterning nanoparticle prepared by droplet deposition are discussed. The review could offer inspiration for the patterning of functional nanomaterials and the precision fabrication of optoelectronic devices by solution processes.