Ultraviolet Electroreflectance of Cuprous Oxide

Abstract

Institute of Applied Physics, Academy of Sciences of the Moldavian SSR, Kishinev Ultraviolet Electroreflectance of Cuprous Oxide BY S. N. SHESTATSKXI and V. V. SOBOLEV During the last years the reflectivity and absorption spectra of Cu 0 have been 2 investigated with great intensity in the wide region of the fundamental absorption (1 to 5). Two communications concerning electroreflectance (ER) (6) and electroabsorption (7) of this material appeared quite recently. In our work (6) the first 3 electroreflectance study of cuprous oxide crystals etched by concentrated HNO was made in the region of blue-green and blue exciton series at T = 293 K. 0

Investigation of Passive Electrodes Using Modulation Spectroscopy and Photopotential Measurements

“…In agreement with this statement different types of spectra are found which depend on the electrode potential [6]. In the potential region were a surface layer of cuprous oxide or a mixture of cuprous and cupric oxide should exist an oscillating structure is found, which is very similar to the electroreflectance spectrum of Cu20 single crystal electrodes [7]. The positive peaks at the wavelength 290 nm and 342 nm with the corresponding negative oscillations at 276 nm and 302 nm (in figure 3 these two minima are not resolved) as well as 325 nm and 369 nm correlate with transitions from 3 d-valence bands of the copper ion in the unit cell to the conduction band at the high symmetry points of the Brillouin zone.…”

Photoelectric Measurements during Corrosion and Inhibition of Copper in Aqueous Solutions

“…In agreement with the previously reported results different types of spectra are found which depend on the electrode potential. In the potential region were a surface layer of cuprous oxide or a mixture of cuprous and cupric oxide should exist an oscillating structure ist found, which is very similar to the electroreflectance spectrum of Cu,O single crystal electrodes [17]. The positive peaks at the wavelength 290nm and 342nm with the corresponding negative oscillations at 276 nm and 302 nm (in Fig.…”