Abstract
Deep level transient spectroscopy has been used to study the effect of substrate pretreatment on the spectrum of electron states in Au/n-GaAs(100) Schottky diodes. Two bands of energy-distributed states have been found near the metal/semiconductor interface. The first band appears in the spectra at temperatures of 200–300 K because elemental arsenic accumulates on the surface in clusters in the course of oxide formation in samples exposed to air. Surface disorder in the course of selective etching gives rise to the second band at 100–250 K. Annealing in selenium vapor heals defects in the surface region and removes both bands from the spectra. Samples annealed in Se2 contain only the set of levels characteristic of bulk GaAs.
Similar content being viewed by others
References
E. H. Rhoderick and R. H. Williams, Metal-Semiconductor Contacts (Clarendon, Oxford, 1988; Radio i svyaz’, Moscow, 1982).
G. M. Mokrousov and O. N. Zarubina, Izv. Tomsk. Politekh. Univ. 313(3), 25 (2008).
A. Seletes, F. Turco, J. Massies, and J. P. Contour, J. Electrochem. Soc. 135, 504 (1988).
N. A. Torkhov, Semiconductors 37, 1177 (2003).
V. G. Bozhkov, N. A. Torkhov, I. V. Ivonin, and V. A. Novikov, Semiconductors 42, 531 (2008).
C. D. Thurmond, G. P. Schwartz, G. W. Kammlott, and B. Schwartz, Solid State Sci. Technol. 127, 1366 (1980).
Hong H. Lee and L. Figueroa, J. Electrochem. Soc. 135, 496 (1988).
P. J. Grunthaner, R. P. Vasquez, and F. J. Crunthaner, J. Vac. Sci. Technol. 17, 1945 (1980).
G. Hollinger, R. Skheyta-Kabbani, and M. Gendry, Phys. Rev. B 49, 11159 (1994).
A. G. Baca and Carol Iris Hill Ashby, Fabrication of GaAs Devices (Inst. of Electrical Engineers, UK, 2005).
D. A. Allwood, S. Cox, N. J. Mason, R. Palmer, R. Young, and P. J. Walker, Thin Solid Films 412, 76 (2002).
G. Marrakchi, M. Gavard, G. Guillot, E. Rosencher, and A. Nauailhat, Appl. Phys. Lett. 54, 540 (1988).
Yu. V. Kapitonov, in Proceedings of the Young Scientists Conference on Physics and Progress, to the 100th anniversary of V.A. Fock’s Birth (SPb., Russia, 2008), p. 169. http://www.phys.spbu.ru/content/File/PhysicsAnd-Progress/Bokk-2008.pdf
P. N. Brunkov, A. A. Gutkin, A. K. Moiseenko, Yu. G. Musikhin, V. V. Chaldyshev, N. N. Cherkashin, S. G. Konnikov, V. V. Preobrazhenskii, M. A. Putyato, and B. R. Semyagin, Semiconductors 38, 387 (2004).
B. I. Sysoev, N. N. Bezryadin, G. I. Kotov, B. L. Agapov, and V. D. Strygin, Semiconductors 29, 12 (1995).
V. N. Bessolov and M. V. Lebedev, Semiconductors 32, 1141 (1998).
N. N. Bezryadin, G. I. Kotov, S. V. Kuzubov, I. N. Arsen’ev, I. S. Tarasov, A. A. Starobubtsev, and A. B. Sysoev, Tech. Phys. Lett. 34, 428 (2008).
N. N. Bezryadin, G. I. Kotov, A. V. Kadantsev, L. V. Vasil’eva, and Yu. N. Vlasov, Instrum. Exp. Tech. 53, 430 (2010).
A. V. Markov, A. Y. Polyakov, N. B. Smirnov, Y. N. Bolsheva, A. V. Govorkov, and B. N. Sharonov, Solid State Electron. 46, 269 (2002).
T. J. Drummond, Phys. Rev. B 59, 8182 (1999).
C. V. Reddy, S. Fing, and C. D. Beling, Phys. Rev. B 54, 11290 (1996).
A. Cavallini and L. Polenta, J. Appl. Phys. 98, 023708 (2005).
P. N. K. Deenapanray, H. H. Tan, C. Jagadish, and F. D. Auret, J. Appl. Phys. 88, 5017 (2000).
V. N. Brudnyi and V. V. Peshev, Semiconductors 37, 140 (2003).
B. L. Agapov, N. N. Bezryadin, Yu. N. Synorov, G. I. Kotov, E. A. Tatokhin, A. A. Starodubtsev, and S. V. Kuzubov, J. Surf. Invest. 1, 750 (2007).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.N. Bezryadin, G.I. Kotov, I.N. Arsentyev, Yu.N. Vlasov, A.A. Starodubtsev, 2012, published in Fizika i Tekhnika Poluprovodnikov, 2012, Vol. 46, No. 6, pp. 756–760.
Rights and permissions
About this article
Cite this article
Bezryadin, N.N., Kotov, G.I., Arsentyev, I.N. et al. Effect of the finishing treatment of a gallium arsenide surface on the spectrum of electron states in n-GaAs (100). Semiconductors 46, 736–740 (2012). https://doi.org/10.1134/S1063782612060073
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063782612060073