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Current-voltage-temperature analysis of inhomogeneous Au/n-GaAs Schottky contacts

Published online by Cambridge University Press:  18 August 2005

M. Biber*
Affiliation:
Atatürk University, Faculty of Science and Arts, Department of Physics, 25240 Erzurum, Turkey
C. Coşkun
Affiliation:
Atatürk University, Faculty of Science and Arts, Department of Physics, 25240 Erzurum, Turkey
A. Türüt
Affiliation:
Atatürk University, Faculty of Science and Arts, Department of Physics, 25240 Erzurum, Turkey
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Abstract

The forward current-voltage (I-V) characteristics of Au/n-GaAs Schottky barrier diodes (SBDs) have been studied over a wide temperature range (80–300 K). The barrier height inhomogeneities by assuming a Gaussian distribution of barrier heights at the interface were observed. The evaluation of the experimental I-V data reveals a non-linear increase of the zero-bias barrier height ($q\Phi _{0}$). To remove the spatial inhomogeneity of the barrier height based on small regions or patches and to increase the barrier height compared to the reference sample Au/n-GaAs, the front surface of the n-type GaAs semiconductor has been oxidized by the anodic oxidation method and metal/insulating/semiconductor (MIS) Au/n-GaAs SBDs have been formed. The ln($I_{0}/T^{2}$) versus 1/T and $q\Phi _{0}$ versus T plots of the MIS have exhibited the linear behavior in the temperature range of 80–300 K. Thus, the I-V data of the MIS diodes have obeyed the interfacial layer model due to the interfacial layer and it has been concluded that the inhomogeneity of the barrier height can be disappeared by a formed interfacial layer at the metal and semiconductor interface.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 2005

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References

Jones, F.E., Daniel-Hafer, C., Wood, B.P., Danner, R.G., Lonergan, M.C., J. Appl. Phys. 90, 1001 (2001) CrossRef
Sullivan, J.P., Tung, R.T., Pinto, M.R., Graham, W.R., J. Appl. Phys. 70, 7403 (1991)
Werner, J.H., Appl. Phys. A 47, 291 (1988) CrossRef
W. Mönch, Metallization and Metal-Semiconductor Inter faces, edited by I.P. Batra (Plenium, New York, 1989), Vol. 195, pp. 11–35
Türüt, A., Batı, B., Kökçe, A., Sağlam, M., Yalçın, N., Phys. Scripta 53, 118 (1996) CrossRef
Hudait, M.K., Krupanidhi, S.B., Solid-State Electron. 44, 1089 (2000) CrossRef
Schottky, W., Naturwissenchaften 26, 843 (1938) CrossRef
Mott, N.F., Proc. Cambridge Philos. Soc. 34, 568 (1938) CrossRef
Mönch, W., Phys. Rev. B 37, 7129 (1988) CrossRef
Mui, D., Strite, S., Morkoç, H., Solid-State Electron. 34, 1077 (1991) CrossRef
S.M. Sze, Physics of Semiconductor Devices, 2nd edn. (Willey, New York, 1981)
Vanalme, G.M., Goubert, L., Van Meirhaeghe, R.L., Cordon, F., Van Daele, P., Semicond. Sci. Technol. 14, 871 (1987) CrossRef
Bhuiyan, A.S., Martinez, A., Esteve, D., Thin Solid Films 161, 93 (1988) CrossRef
Werner, J.H., Guttler, H.H., J. Appl. Phys. 69, 1522 (1991) CrossRef
Chand, S., Kumar, J., Appl. Phys. A 63, 171 (1996)
Hardikar, S., Hudait, M.K., Modak, P., Krupanidhi, S.B., Padha, N., Appl. Phys. A 68, 49 (1999) CrossRef
Jones, F.E., Wood, B.P., Myser, J.A., Daniels, C.H., Lonergan, M.C., J. Appl. Phys. 86, 6431 (1999) CrossRef
Hudait, M.K., Venkateswarlu, P., Krupanidhi, S.B., Solid-State Electron. 45, 133 (2001) CrossRef
Chand, S., Kumar, J., Semicond. Sci. Technol. 10, 1680 (1995) CrossRef
Tung, R.T., Phys. Rev. B 45, 1509 (1992) CrossRef
Bandyopadhyay, S., Bhattacharyya, A., Sen, S.K., J. Appl. Phys. 85, 3671 (1999) CrossRef
Zhu, S., Van Meirhaeghe, R.L., Detavernier, C., Cardon, F., Ru, G.P., Qu, X.P., Li, B.Z., Solid State Electron. 44, 663 (2000) CrossRef
Aniltürk, Ö.S., Turan, R., Solid-State Electron. 44, 41 (2000) CrossRef
Jones, F.E., Wood, B.P., Myers, J.A., Daniels, C.H., Lonergan, M.C., J. Appl. Phys. 86, 6431 (1999) CrossRef
E.H. Rhoderick, R.H. Williams, Metal-Semiconductor Contacts, 2nd edn. (Oxford, Clarendon, 1988)
Gümüuş, A., Türüt, A., Yalçın, N., J. Appl. Phys. 91, 245 (2002) CrossRef
Mönch, W., J. Vac. Technol. B 17, 1867 (1999) CrossRef
Temirci, C., Bati, B., Sağlam, M., Türüt, A., Appl. Surf. Sci. 172, 1 (2001) CrossRef
Schmitsdorf, R.F., Kampen, T.U., Mönch, W., Surf. Sci. 324, 249 (1995) CrossRef
Kampen, T.U., Mönch, W., Surf. Sci. 331–333, 490 (1995) CrossRef
Schmitsdorf, R.F., Kampen, T.U., Mönch, W., J. Vac. Sci. Technol. B 15, 1221 (1997) CrossRef
Wittmer, M., Phys. Rev. B 42, 5249 (1990) CrossRef
Horvath, Zs., Solid-State Electron. 39, 176 (1996) CrossRef
Wagner, L.F., Young, R.W., Sugerman, A., IEEE Electr. Device L. 4, 320 (1983) CrossRef
Werner, J.H., Guttler, H.H., J. Appl. Phys. 73, 1315 (1993) CrossRef
Song, Y.P., Van Meirhaeghe, R.L., Laflere, W.H., Cardon, F., Solid-State Electron. 29, 633 (1986) CrossRef
Hübers, H.W., Röser, H.P., J. Appl. Phys. 84, 5326 (1998) CrossRef
Biber, M., Physica B 325, 138 (2003) CrossRef
Card, H.C., Rhoderick, E.H., J. Phys. D 4, 1589 (1971) CrossRef
Biber, M., Temirci, C., Türüt, A., J. Vac. Sci. Technol. B 20, 10 (2002) CrossRef
Quan, D.T., Hbib, H., Solid-State Electron. 36, 339 (1993) CrossRef