Radiation-hardened and Repairable MoS$_2$ Field Effect Devices with Polymer Solid Electrolyte Gates

TL;DR

This paper introduces MoS₂-based radiation-hardened FETs with polymer solid electrolyte gates that withstand up to 10 Mrad of radiation and can be repaired via thermal annealing, advancing Rad-Hard electronics.

Contribution

The study demonstrates a novel MoS₂ PSE-FET with high radiation tolerance and reparability, surpassing existing Rad-Hard device capabilities and enabling wafer-scale integration.

Findings

MoS₂ PSE-FETs tolerate up to 3.75 Mrad (Si) radiation.

Thermal annealing repairs devices after radiation damage.

Wafer-scale Rad-Hard inverter arrays are feasible.

Abstract

As human activities expand into naturally or man-made radiation-prone environment, the need for radiation-hardened (Rad-Hard) electronic hardware surged. The state-of-the-art silicon-based and two-dimensional (2D) materials based Rad-Hard transistors can withstand up to 1 Mrad (Si) of total ionization dose (TID), while higher TID tolerance is being heatedly sought after. Here we present few-layer MoS$_2$ Rad-Hard field-effect transistors (FETs) with polymer solid electrolyte (PSE) gate dielectrics. The MoS$_2$ PSE-FETs exhibit a TID tolerance of up to 3.75 Mrad (Si) at a dose rate of 523 rad (Si) s$^{-1}$ and can be repaired with a moderate thermal annealing at 100 $^{\circ}$C for 5 minutes. Combining the excellent intrinsic radiation tolerance and the reparability, the MoS$_2$ PSE-FETs reach a TID tolerance of up to 10 Mrad (Si). Complementary metal-oxide-semiconductor (CMOS)-like MoS$_2$ PSE-inverters have been built and show similar high radiation tolerance. Furthermore, the feasibility of wafer-scale Rad-Hard PSE-inverter array has been demonstrated using chemical vapor deposition (CVD) grown monolayer MoS$_2$. Our studies uncover the potential of 2D materials based PSE devices in future Rad-Hard integrated circuits (ICs).