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Enhancement of light reflectance and thermal stability in Ag–Cu alloy contacts on -type GaN
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10.1063/1.2956417
/content/aip/journal/apl/93/1/10.1063/1.2956417
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/1/10.1063/1.2956417
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Figures

Image of FIG. 1.
FIG. 1.

(a) Specific contact resistivities of Ag and Ag–Cu contacts as a function of annealing temperature. (b) Change of light reflectance at wavelength for Ag and Ag–Cu contacts as a function of annealing temperature.

Image of FIG. 2.
FIG. 2.

Change of ratios, , and light reflectance at wavelength for Ag and Ag–Cu contacts as a function of annealing time at in air.

Image of FIG. 3.
FIG. 3.

SIMS depth profiles of Ag and Ag–Cu contacts before and after annealing. Ag contact was annealed at and Ag–Cu contact was annealed at . Both contacts were annealed under air atmosphere for .

Image of FIG. 4.
FIG. 4.

SRPES spectra of Ag core levels for (a) Ag and (b) Ag–Cu contacts and secondary electron emission for (c) Ag and (d) Ag–Cu contacts before and after annealing. Binding energy differences of for and for are consistent with previously reported values. (Ref. 12).

Image of FIG. 5.
FIG. 5.

SEM micrographs of (a) Ag contact annealed at and (b) Ag–Cu contact annealed at . AFM phase images of (c) Ag contact annealed at and (d) Ag–Cu contact annealed at .

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/content/aip/journal/apl/93/1/10.1063/1.2956417
2008-07-08
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enhancement of light reflectance and thermal stability in Ag–Cu alloy contacts on p-type GaN
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/1/10.1063/1.2956417
10.1063/1.2956417
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