Patterning technology for solution-processed organic crystal field-effect transistors

• Main Authors: Yun Li, Huabin Sun, Yi Shi, Kazuhito Tsukagoshi
• Format: Article
• Language: English
• Published: Taylor & Francis Group 2014-04-01
• Series: Science and Technology of Advanced Materials
• Online Access: http://dx.doi.org/10.1088/1468-6996/15/2/024203

Organic field-effect transistors (OFETs) are fundamental building blocks for various state-of-the-art electronic devices. Solution-processed organic crystals are appreciable materials for these applications because they facilitate large-scale, low-cost fabrication of devices with high performance. Patterning organic crystal transistors into well-defined geometric features is necessary to develop these crystals into practical semiconductors. This review provides an update on recent development in patterning technology for solution-processed organic crystals and their applications in field-effect transistors. Typical demonstrations are discussed and examined. In particular, our latest research progress on the spin-coating technique from mixture solutions is presented as a promising method to efficiently produce large organic semiconducting crystals on various substrates for high-performance OFETs. This solution-based process also has other excellent advantages, such as phase separation for self-assembled interfaces via one-step spin-coating, self-flattening of rough interfaces, and in situ purification that eliminates the impurity influences. Furthermore, recommendations for future perspectives are presented, and key issues for further development are discussed.