Toshitake Takahashi received his B.S and M.S degrees in Materials Engineering from Keio University and the University of Tokyo, respectively. He is currently pursuing a Ph.D degree in the department of electrical engineering and computer sciences at the University of California, Berkeley. His research interests include flexible electonics using nanomaterials.
Large-Scale Carbon Nanotube Network Active Matrix Circuitry for Flexible and Stretchable Electronics [BPN629]
In this project, we will explore a promising approach for large-scale flexible and stretchable electronics using
semiconductor-enriched carbon nanotube (CNTs) solution. In conventional flexible devices, organic materials or amorphous silicon
have been intensively explored, but its inherently low electrical performance limits the range of potential applications. Here, we use
solution-based approach in which semiconductor-enriched CNTs (99 %) are deposited uniformly on wafer-scale flexible polyimide
(PI) substrate or Polydimethylsiloxane (PDMS) substrate at room temperature, and obtain mobility of ~ 20 cm2V-1s-1, an order of
magnitude larger than conventional materials, without sacrificing current on/off ratio (ION/IOFF of ~ 104). The PI substrate readily
turns into a stretchable substrate by cutting the PI into open mesh geometry, showing a stretchability of 11.5 % without noticeable
device degradation. The concept of CNT network-based flexible and stretchable active matrix circuitry can be potentially expanded
to achieve multifunctional sensors by adding various components on top of this backplane.