Carrier transport and electronic defects in gallium oxide studied by photoconductivity techniques

Stephen Reynolds; David Nicol; Matthew Smith; Arpit Nandi; Sai Charan Vanjali; Martin Kuball; Fabien Massabuau

doi:10.1088/1742-6596/2952/1/012001

Carrier transport and electronic defects in gallium oxide studied by photoconductivity techniques

Stephen Reynolds (Lead / Corresponding author), David Nicol, Matthew Smith, Arpit Nandi, Sai Charan Vanjali, Martin Kuball, Fabien Massabuau

Science and Engineering Office

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Abstract

Two complementary localised density of states spectroscopies, Modulated Photo-Conductivity (MPC) and the Constant Photocurrent Method (CPM) are applied to Ga2O3 thin films and are shown to be sensitive to carrier traps above and below the Fermi level, respectively. These techniques measure the film directly, without requiring a Schottky or p-n junction, which may offer advantages over conventional techniques in the study of high-resistivity or semi-insulating materials. The benefits of a higher-resolution MPC analysis are demonstrated.

Original language	English
Article number	012001
Number of pages	11
Journal	Journal of Physics: Conference Series
Volume	2952
Issue number	1
Early online date	1 Feb 2025
DOIs	https://doi.org/10.1088/1742-6596/2952/1/012001
Publication status	Published - 17 Feb 2025
Event	23rd International School on Condensed Matter Physics (ISCMP 2024): "Recent Progress in Advanced Materials and Applications" - Varna, Bulgaria Duration: 26 Aug 2024 → 30 Aug 2024 Conference number: 23

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10.1088/1742-6596/2952/1/012001Licence: CC BY

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title = "Carrier transport and electronic defects in gallium oxide studied by photoconductivity techniques",

abstract = "Two complementary localised density of states spectroscopies, Modulated Photo-Conductivity (MPC) and the Constant Photocurrent Method (CPM) are applied to Ga2O3 thin films and are shown to be sensitive to carrier traps above and below the Fermi level, respectively. These techniques measure the film directly, without requiring a Schottky or p-n junction, which may offer advantages over conventional techniques in the study of high-resistivity or semi-insulating materials. The benefits of a higher-resolution MPC analysis are demonstrated.",

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AU - Reynolds, Stephen

AU - Nicol, David

AU - Smith, Matthew

AU - Nandi, Arpit

AU - Vanjali, Sai Charan

AU - Kuball, Martin

AU - Massabuau, Fabien

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AB - Two complementary localised density of states spectroscopies, Modulated Photo-Conductivity (MPC) and the Constant Photocurrent Method (CPM) are applied to Ga2O3 thin films and are shown to be sensitive to carrier traps above and below the Fermi level, respectively. These techniques measure the film directly, without requiring a Schottky or p-n junction, which may offer advantages over conventional techniques in the study of high-resistivity or semi-insulating materials. The benefits of a higher-resolution MPC analysis are demonstrated.

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U2 - 10.1088/1742-6596/2952/1/012001

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VL - 2952

JO - Journal of Physics: Conference Series

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T2 - 23rd International School on Condensed Matter Physics (ISCMP 2024)

Y2 - 26 August 2024 through 30 August 2024

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Carrier transport and electronic defects in gallium oxide studied by photoconductivity techniques

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