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Effect of Indentation on I-V Characteristics of Au/n-GaAs Schottky Barrier Diodes

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Effect of Indentation on I-V Characteristics of Au/n-GaAs Schottky Barrier Diodes

Ahmet Faruk Ozdemira, Adnan Calikb, Guven Cankayac, Osman Sahina, and Nazim Ucara

aDepartment of Physics, Art and Science Faculty, Suleyman Demirel University, Isparta, Turkey

bDepartment of Mechanical Education, Technical Education Faculty, Suleyman Demirel University, Isparta, Turkey

cDepartment of Physics, Art and Science Faculty, Gaziosmanpasa University, Tokat, Turkey Reprint requests to A. F. O.; E-mail: nazmucar@yahoo.com

Z. Naturforsch.63a,199 – 202 (2008); received October 1, 2007

Au/n-GaAs Schottky barrier diodes (SBDs) have been fabricated. The effect of indentation on Schottky diode parameters such as Schottky barrier height (φb) and ideality factor (n) was studied by current-voltage (I-V) measurements. The method used for indentation was the Vickers microhardness test at room temperature. The experimental results showed that theI-Vcharacteristics move to lower currents due to an increase ofφbwith increasing indentation weight, while contacts showed a nonideal diode behaviour.

Key words:Schottky Barrier Diode; Barrier Height; Ideality Factor; Indentation; Fermi Level Pinning.

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