Publication

Radiation tolerance of two-dimensional material-based devices for space applications

13/03/2019

Tobias Vogl, Ben C. Buchler, Ping Koy Lam, et al.

Nature Communications, 10, 1202 (2019)

Radiation tolerance of two-dimensional material-based devices for space applications

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 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 γ-rays, protons and electrons. The devices show negligible change in performance after the irradiation, suggesting robust suitability for space use. Under excessive γ-radiation, however, monolayer WS2 shows 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 is traced back to radiation-induced defect healing, wherein dissociated oxygen passivates sulfur vacancies.

PhD candidate Tobias Vogl from the ANU Research School of Physics and Engineering with his research demonstrating atomically thin 2D materials.

University: Australian National University

Authors Centre Participants: Prof. Ping Koy Lam, A. Prof. Ben C. Buchler, Tobias Vogl, Kabilan Sripathy, Ankur Sharma, Prithvi Reddy, James Sullivan, Joshua R. Machacek, Linglong Zhang, Fouad Karouta, Marcus W. Doherty, Yuerui Lu

Source: Nature Communications

Publication Type: Refereed Journal article

DOI Link: DOI Link

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