The trends of the future electronic devices should be miniaturized, flexible, stable, portable, light, and highly integrated.Although flexible electronic products (i.e., flexible display products [1-3], batteries [4, 5],cell phones [6]) have been commercially available recently,which represents the starting of a new era in electronics,these progresses are still in their infancy and more efforts are required to boom their multifunction and speed up their marketization from lab.Considering their low-cost and mass-productive synthesis technologies, rich species, high performances, and especially, the excellent flexibility and stability, organic materials (insulating, conductive and semiconducting) have triggered the tide of the development of "plastic electronics", especially in transistors, an indispensable logic device in these logic-control based devices (i.e.,intelligent electronics).