Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy

Matthias M. May; Oliver Supplie; Christian Höhn; Wolf-Dietrich Zabka; Hans-Joachim Lewerenz; Roel van de Krol; Thomas Hannappel

doi:10.1117/12.2026172

16 September 2013 Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy

Matthias M. May, Oliver Supplie, Christian Höhn, Wolf-Dietrich Zabka, Hans-Joachim Lewerenz, Roel van de Krol, Thomas Hannappel

Author Affiliations +

Proceedings Volume 8822, Solar Hydrogen and Nanotechnology VIII; 88220M (2013) https://doi.org/10.1117/12.2026172
Event: SPIE Solar Energy + Technology, 2013, San Diego, California, United States

Abstract

In this work, we investigate the initial interaction of water and oxygen with different surface reconstructions of GaP(100) applying photoelectron spectroscopy, low-energy electron diffraction, and reflection anisotropy spectroscopy. Surfaces were prepared by metal-organic vapour phase epitaxy, transferred to ultra-high vacuum, and exposed to oxygen or water vapour at room temperature. The (2 4) reconstructed, Ga-rich surface is more sensitive and reactive to adsorption, bearing a less ordered surface reconstruction upon exposure and indicating a mixture of dissociative and molecular water adsorption. The p(2 2)=c(4 2) P-rich surface, on the other hand, is less reactive, but shows a new surface symmetry after water adsorption. Correlating findings of photoelectron spectroscopy with reflection anisotropy spectroscopy could pave the way towards optical in-situ monitoring of electrochemical surface modifications with reflection anisotropy spectroscopy.

Citation Download Citation

Matthias M. May, Oliver Supplie, Christian Höhn, Wolf-Dietrich Zabka, Hans-Joachim Lewerenz, Roel van de Krol, and Thomas Hannappel "Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy", Proc. SPIE 8822, Solar Hydrogen and Nanotechnology VIII, 88220M (16 September 2013); https://doi.org/10.1117/12.2026172

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