Projects per year
Abstract
We present a study of the electrical, structural and chemical properties of Ti contacts on atomic layer deposited α-Ga2O3 film. Ti forms an ohmic contact with α-Ga2O3. The contact performance is highly dependent on the post-evaporation annealing temperature, where an improved conductivity is obtained when annealing at 450 °C, and a strong degradation when annealing at higher temperatures. Structural and chemical characterisation by transmission electron microscopy techniques reveal that the electrical improvement or degradation of the contact upon annealing can be attributed to oxidation of the Ti metallic layer by the Ga2O3 film in combination with the possibility for Ti diffusion into the Au layer. The results highlight that the grain boundaries and inclusions in the Ga2O3 film provide fast diffusion pathways for this reaction, leaving the α-Ga2O3 crystallites relatively unaffected - this result differs from previous reports conducted on β-Ga2O3. This study underlines the necessity for a phase-specific and growth method-specific study of contacts on Ga2O3 devices.
Original language | English |
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Article number | 384001 |
Number of pages | 7 |
Journal | Journal of Physics D: Applied Physics |
Volume | 54 |
Issue number | 38 |
Early online date | 8 Jul 2021 |
DOIs | |
Publication status | Published - 23 Sep 2021 |
Keywords
- Ti alloys
- α-Ga2O3
- atomic layers
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Doctoral Training Partnership 2020-2021 University of Strathclyde | Nicol, David
Massabuau, F., Martin, R. & Nicol, D.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/20 → 1/04/24
Project: Research Studentship - Internally Allocated
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Datasets
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Data for: "Study of Ti contacts to corundum α-Ga2O3"
Massabuau, F. (Creator), Nicol, D. (Creator), Adams, F. (Creator), Jarman, J. (Creator), Roberts, J. (Creator), Kovacs, A. (Creator), Chalker, P. (Creator) & Oliver, R. (Creator), University of Strathclyde, 22 Jun 2021
DOI: 10.15129/2c4c3e3a-71e4-4646-bfaa-d4ec62941c44
Dataset
Prizes
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2021 Emerging Leader in J. Phys. D: Appl. Phys.
Massabuau, Fabien (Recipient), 2021
Prize: National/international honour
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