Proton irradiation Of Ga2O3 Schottky diodes and NiO/Ga2O3 heterojunctions

Polyakov, A.Y.; Saranin, D.S.; Shchemerov, I.V.; Vasilev, A.A.; Romanov, A.A.; Kochkova, A.I.; Gostischev, P.; Chernykh, A.V.; Alexanyan, L.A.; Matros, N.R.; Lagov, P.B.; Doroshkevich, A.S.; Isayev, R.S.; Pavlov, Y.S.; Kislyuk, A.M.; Yakimov, E.B.; Pearton, S.J.

Авторы: Polyakov Alexander Y., Saranin Danila S., Shchemerov Ivan V., Vasilev Anton A., Romanov Andrei A., Kochkova Anastasiia I., Gostischev Pavel, Chernykh Alexey V., Alexanyan Luiza A., Matros Nikolay R., Lagov Petr B., Doroshkevich Aleksandr S., Isayev Rafael Sh, Pavlov Yu S., Kislyuk Alexander M., Yakimov Eugene B., Pearton Stephen J.
Журнал: Scientific reports
Том: 14
Номер: 1
Год издания: 2024
Издательство: Nature Publishing Group
Местоположение издательства: United Kingdom
Первая страница: 27936
Номер статьи: 27936
DOI: 10.1038/s41598-024-78531-y
Аннотация: p-NiO/n-Ga2O3 heterojunction (HJ) diodes exhibit much larger changes in their properties upon 1.1 MeV proton irradiation than Schottky diodes (SDs) prepared on the same material. In p-NiO/Ga2O3 HJ diodes, the narrow region adjacent to the HJ boundary is found to contain a high density of relatively deep centers with levels near EC-0.17 eV and a depleted region in the immediate vicinity of the HJ boundary. The series resistance of the HJ diodes is slightly higher than for the Schottky diodes and shows a temperature dependence with activation energy ~ 0.12 eV, like the temperature dependence of the NiO film resistivity. Irradiation with 1.1 MeV protons leads to a decrease of the hole concentration in the NiO, with a high carrier removal rate of ~ 1.3 × 105 cm−1 and a strong compensation of the interfacial region where the concentration of the EC-0.17 eV centers decreases with a high rate of ~ 7 × 103 cm−1. The combined action of these two effects gives rise to the much stronger increase of the series resistance of the HJ diodes compared to Schottky diodes. The observed differences between the radiation response of the HJs and SDs cannot be credibly attributed to the changes of the density of any of the deep electron and hole traps detected in our experiments.
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Proton irradiation Of Ga2O3 Schottky diodes and NiO/Ga2O3 heterojunctionsстатья Исследовательская статья

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