Sub-bandgap photon-assisted electron trapping and detrapping in AlGaN/GaN heterostructure field-effect transistors

نویسندگان

چکیده

Abstract We have investigated photon-assisted trapping and detrapping of electrons injected from the gate under negative bias in a heterostructure field-effect transistor (HFET). The electron injection rate was found to be dramatically affected by sub-bandgap laser illumination. trapped reduced two-dimensional gas (2DEG) density at AlGaN/GaN heterointerface but could also emitted their trap states photons, leading recovery 2DEG density. dynamics were strongly dependent on wavelength focal position laser, as well stress time prior illumination HFET. Applying this phenomenon assisted red, green, purple lasers used demonstrate photo-assisted dynamic switching operations manipulation carriers surface an A physical model based band diagrams, explaining behavior electrons, has been presented.

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ژورنال

عنوان ژورنال: Physica Scripta

سال: 2023

ISSN: ['1402-4896', '0031-8949']

DOI: https://doi.org/10.1088/1402-4896/acd3c2