Journal
APPLIED PHYSICS LETTERS
Volume 120, Issue 23, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0096950
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Funding
- NSF [ECCS1802208, ECCS2127916]
- US-Israel BSF [2018010]
- NATO [G5748]
- Department of Defense, Defense Threat Reduction Agency [HDTRA1-20-2-0002]
- NSF DMR [1856662]
- French National Agency of Research (ANR) [CE-50 N0015-01]
- Direct For Social, Behav & Economic Scie
- Division Of Behavioral and Cognitive Sci [2018010] Funding Source: National Science Foundation
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Undoped p-type gallium oxide samples with high resistance were subjected to cumulative proton irradiation, resulting in a 2-fold reduction in the diffusion length of minority carriers. However, electron injection using a scanning electron microscope beam led to an elongation of the diffusion length, indicating a stable recovery from the adverse radiation impact.
Highly resistive undoped p-type gallium oxide samples were subjected to cumulative proton irradiation with energies ranging from 25 to 70 keV and doses in the 1.6 x 10(14)-3.6 x 10(14) cm(-2) range. Proton irradiation resulted in up to a factor of 2 reduction of minority electron diffusion length in the samples for temperatures between ~300 and 400 K. Electron injection into the samples under test using a scanning electron microscope beam leads to pronounced elongation of diffusion length beyond the pre-irradiation values, thus demonstrating stable (days after injection) recovery of adverse radiation impact on minority carrier transport. The activation energy of 91 meV estimated from the temperature dependent diffusion length vs electron injection duration experiments is likely related to the local potential barrier height for native defects associated with the phenomenon of interest. Published under an exclusive license by AIP Publishing.
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