Organic field-Effect transistors (OFETs) as the primary building blocks of flexible electronics have been intensively studied, and considerable progresses on high performance materials development and multifunctional application have been recently made. Attributed to mild operating conditions and versatile manufacturing processes, solution process technologies become the appreciable choice for large-scale, low-cost OFETs fabrication. Compared with conjugated polymers, small molecular organic semiconductors reach a high degree of stacking density, ordering degree and material purity, which facilitate high performance devices fabrication. However, small molecular semiconductors bear poor film-forming ability, which hinders its solution processing technology development. Consequently, how to fabricate homogeneous, large area, well-defined small molecular semiconductors film, and large-scale, high performance devices array by different solution processing technologies becomes the hotspot in this field. This review provides a brief overview of recent advances in the solution processable small molecular organic semiconductors with high performance. Besides, according to the technology characteristics, the large-scale OFETs solution processing technologies are classified into drop casting, meniscus guided coating, and printing. Finally, the prospects and challenge for solution processed large-scale small molecular OFETs are also discussed.

Contents
1 Introduction
2 Solution processable small molecular organic semiconductors
2.1 p-Type small molecular organic semiconductors
2.2 n-Type small molecular organic semiconductors
2.3 Ambipolar small molecular organic semiconductors
3 Solution processing technologies of large-scale small molecular OFETs
3.1 Drop casting
3.2 Meniscus guided coating
3.3 Printing
3.4 Thin-film post-processing technology
4 Conclusion and outlook