12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Electrical and surface morphological studies of palladium and ruthenium Schottky diodes on n-Ge (100)

13 Jul 2011, 17:00


Poster Presentation Track A - Condensed Matter Physics and Material Science Poster1


Prof. Albert Chawanda (University of Pretoria)


Palladium (Pd) and ruthenium (Ru) Schottky barrier diodes were fabricated on (100) Sb-doped n-type germanium using resistive evaporation and electron beam deposition systems, respectively. Electrical characterization of these diodes using current-voltage (I-V) measurements was performed under various annealing conditions. The morphological evolution of the surface was analysed using the scanning electron microscopy. The variation of the electrical and structural properties of these Schottky diodes can be attributed to combined effects of interfacial reaction and phase transformation during the annealing process. Thermal stability of both the Pd/n-Ge (100) and Ru/n-Ge (100) Schottky diodes is maintained up to annealing temperature of 550°C. Results have also indicated that the onset temperature for agglomeration in Pd/n-Ge (100) system occurs between 500 – 600°C, and in Ru/n-Ge (100) system occurs between 600 – 700°C.

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Primary author

Prof. Albert Chawanda (University of Pretoria)


Dr C Nyamhere (Nelson Mandela Metropolitan University) Prof. F.D Auret (University of Pretoria) Dr J.M. Nel (University of Pretoria) Dr M Diale (University of Pretoria) Mr W Mtangi (University of Pretoria)

Presentation Materials