3D monolithic integration in flexible printed organic transistors

Presenter: Dr. Sungjune Jung (Pohang University of Science and Technology (POSTECH), S. Korea)

Topic: 3D monolithic integration in flexible printed organic transistors

Time: 10:00 am, November 16thFriday 

Location:909-B,Dushu Lake Campus


Direct printing of thin-film transistors has enormous potential for ubiquitous and lightweight wearable electronic applications. However, advances in printed integrated circuits remain very rare. Here, we present a three-dimensional (3D) integration approach to achieve technology scaling in printed transistor density, analogous to Moore’s law driven by lithography, as well as enhancing device performance. To provide a proof of principle for the approach, we demonstrate the scalable 3D integration of dual-gate organic transistors on plastic foil by printing with high yield, uniformity, and year-long stability. The effective control of charge transport within the bulk of a semiconductor wrapped by two gates resolves the chronic issues of conventional single-gate organic transistors, such as high subthreshold leakage/swing, limited transconductance, and low on-off ratio. In addition, the 3D stacking of three complementary transistors enables us to propose a programmable 3D logic array as a new route to design printed flexible digital circuitry essential for the emerging applications. The 3D monolithic integration strategy demonstrated here is applicable to other emerging printable materials, such as carbon nanotubes, oxide semiconductors and 2D semiconducting materials.



Dr. Sungjune Jung is an associate professor of Creative IT Engineering in Pohang University of Science and Technology (POSTECH). He is also affiliated with Department of Chemical Engineering, Electrical Engineering, Mechanical Engineering, Integrative Bioscience and Biotechnology (IBB) and School of Interdisciplinary bioscience and bioengineering (IBIO). 

He received his PhD degree from the University of Cambridge in 2007 and subsequently joined the Cavendish Laboratory of University of Cambridge. Before his PhD, he worked for Samsung Electronics, Digital Printing Division for 3 years. He has been leading the Bio-printing and printed electronics laboratory since he joined POSTECH in 2013.