Printed and Flexible Electronics and Devices: An Overview
The rapid emergence of the Internet of Things era has led to increased research activities in the area of printed and flexible electronics. The research areas include, but not limited to, ink development and characterization, printing tool and process development to obtain desirable characteristics of printed conductors, semiconductors and dielectrics, post-processing including annealing, and demonstration of various printing applications on a wide variety of flexible substrates including paper, plastics and textiles. This tutorial will provide an overview of the above topics and applications for printing including gas sensors, biosensors, UV and other radiation detectors, supercapacitors, triboelectric nanogenerators (TENGs), memory devices, electromagnetic interference (EMI) shielding, metasurfaces and others. The author thanks Jin-Woo Han, Myeonglok Seol, Beomseok Kim, Sunjin Kim, Dongil Moon, Dongil Lee, Kyung Jean Yoon, Jessica Kohene, Ram Gandhiraman, Daniel Gutierrez and Pranay Doshi for their contributions.