Material research for organic electroluminescence devices and a preparation method of organic thin films

摘要

Nowadays, organic semiconductors are applied to optoelectronics such as organic electroluminescence devices. However, many promising materials are left without investigation for device application simply because they have low solubility and cannot be fabricated into thin films. We have developed a spray deposition method as a novel way to prepare organic thin films. In this method, a highly diluted solution of a functional organic material, such as a π-coniugated polymer, is nebulized into air and concentrated under a controlled evaporation condition. The resulting aerosol is transported by a carrier gas and deposited onto a solid substrate. We successfully prepared a thin film of a poly-p-phenylenevinylene derivative from a highly diluted solution at the concentration of 0.0001 wt% and fabricated an electroluminescent device with the layer-by-layer structure or separate-coating of deferent derivatives.