posted on 2021-08-27, 17:03authored byAndreas Hemmetter, Xinxin Yang, Zhenxing Wang, Martin Otto, Burkay Uzlu, Marcel Andree, Ullrich Pfeiffer, Andrei Vorobiev, Jan Stake, Max C. Lemme, Daniel Neumaier
Flexible energy harvesting
devices fabricated in scalable thin-film
processes are crucial for wearable electronics and the Internet of
Things. We present a flexible rectenna based on a one-dimensional
junction metal–insulator–graphene diode, offering low-noise
power detection at terahertz (THz) frequencies. The rectennas are
fabricated on a flexible polyimide film in a scalable process by photolithography
using graphene grown by chemical vapor deposition. A one-dimensional
junction reduces the junction capacitance and enables operation up
to 170 GHz. The rectenna shows a maximum responsivity of 80 V/W at
167 GHz in free space measurements and minimum noise equivalent power
of 80 pW/√Hz.