Analysis of current collapse effect in AlGaN/GaN HEMT: experiments and numerical simulations
| Autor: | Dominique Carisetti, Nathalie Malbert, Fausto Fantini, Nathalie Labat, Benoit Lambert, Mohsine Bouya, Giovanni Verzellesi, Mustapha Faqir |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
GaN HEMTs
trap effects current collapse kink Condensed matter physics Aluminium nitride Gallium nitride High-electron-mobility transistor Trapping Electron Condensed Matter Physics Atomic and Molecular Physics and Optics Isothermal process Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Ternary compound Electric field Electrical and Electronic Engineering Safety Risk Reliability and Quality |
| Popis: | In this work, current collapse effects in AlGaN/GaN HEMTs are investigated by means of measurements and two-dimensional physical simulations. According to pulsed measurements, the used devices exhibit a significant gate-lag and a less pronounced drain-lag ascribed to the presence of surface/barrier and buffer traps, respectively. As a matter of fact, two trap levels (0.45 eV and 0.78 eV) were extracted by trapping analysis based on isothermal current transient. On the other hand, 2D physical simulations suggest that the kink effect can be explained by electron trapping into barrier traps and a consequent electron emission after a certain electric-field is reached. |
| Databáze: | OpenAIRE |
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