Radiation tolerance of two-dimensional material-based devices for space applications
Abstract
Characteristic for devices based on two-dimensional materials are their low size, weight and power requirements. This makes them advantageous for use in space instrumentation, including photovoltaics, batteries, electronics, sensors and light sources for long-distance quantum communication. Here, we present for the first time a comprehensive study on combined radiation effects in earth's atmosphere on various devices based on these nanomaterials. Using theoretical modeling packages, we estimate relevant radiation levels and then expose field-effect transistors, single-photon sources and monolayers as building blocks for future electronics to gamma-rays, protons and electrons. The devices show negligible change in performance after the irradiation, suggesting robust suitability for space use. Under excessive -radiation, however, monolayer WS showed decreased defect densities, identified by an increase in photoluminescence, carrier lifetime and a change in doping ratio proportional to the photon flux. The underlying mechanism was traced back to radiation-induced defect healing, wherein dissociated oxygen passivates sulfur vacancies.
Cite
@article{arxiv.1811.10138,
title = {Radiation tolerance of two-dimensional material-based devices for space applications},
author = {Tobias Vogl and Kabilan Sripathy and Ankur Sharma and Prithvi Reddy and James Sullivan and Joshua R. Machacek and Linglong Zhang and Fouad Karouta and Ben C. Buchler and Marcus W. Doherty and Yuerui Lu and Ping Koy Lam},
journal= {arXiv preprint arXiv:1811.10138},
year = {2019}
}