6. Conclusions and future outlook

In general, impressive progress has been accomplished in the design, synthesis, and processing of organic semiconductors in the past few years. In the future, organic semiconductors will become more attractive due to comparable performance to traditional amorphous inorganic semiconductor materials, and their near-infinite tunability. Meanwhile, for large-scale fabrication of low-cost devices, solution-based film deposition processes at low temperatures with high charge carrier mobility are highly desirable.

Currently, more attention is focused on the solution-processable, air-stable high-performance organic n-type semiconductor; the relationship between the molecular structure of the organic semiconductor and device performance; and large area semiconductor thin-film alignment. Meanwhile, some important issues still need further investigation such as operational stability, low-cost and large area fabrication process, device integration, as well as functionalization in sensor fields. The study of the defect electronic structure of organic semiconductors will also be the important subject in the coming years.

In summary, although organic materials and devices still have some deficiencies, they can be improved and used in a wide range of low-cost functional devices to meet the needs of different markets, and they are sure to become a unique feature of our life in the future.
