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- W1253345195 abstract "Abstract The evolution of Ni/Au and Ni/Ir/Au metal contacts deposited on AlGaN was investigated at different annealing temperatures. The samples were studied with electrical and chemical composition techniques. I–V characteristics of the Schottky diodes were optimum after 500 and 600 °C annealing for Ni/Au and Ni/Ir/Au based diodes, respectively. The depth profiles of the contacts were measured by x-ray photoelectron spectroscopy and time of flight secondary ion mass spectroscopy. These chemical composition techniques were used to examine the evolution of the metal contacts in order to verify the influence the metals have on the electrical properties of the diodes. The insertion of Ir as a diffusion barrier between Ni and Au effected the electrical properties, improving the stability of the contacts at high temperatures. Gold diffused into the AlGaN film, degrading the electrical properties of the Ni/Au diode. At 500 °C, the insertion of Ir, however, prevented the in-diffusion of Au into the AlGaN substrate." @default.
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- W1253345195 date "2016-01-01" @default.
- W1253345195 modified "2023-09-28" @default.
- W1253345195 title "Chemical and electrical characteristics of annealed Ni/Au and Ni/Ir/Au contacts on AlGaN" @default.
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- W1253345195 doi "https://doi.org/10.1016/j.physb.2015.08.051" @default.
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