Photoelectrochemical behavior of gallium arsenide and the possibility of protecting it from photocorrosion by a titanium dioxide film

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Sov. Electrochem. (Engl. Transl.); (United States)

OSTI ID:5237090

Aliev, A Sh; Alekperov, A I; Fateev, V N; Pakhomov, V P

Corrosion-resistant anodic semiconductors sensitive to the visible part of the spectrum are very important for the photoelectrochemical decomposition of water to convert solar energy. One of the methods of solving the problem is to devise a composite consisting of a relatively narrow bandgap semiconductor and a protective coating consisting of a corrosion-resistant wide-bandgap semiconductor such as TiO/sub 2/. This paper reports further studies on the possibility of using the composites for the photoelectrochemical decomposition of water by a GaAs-TiO/sub 2/ system. The authors used n-type GaAs single crystals. Since the TiO/sub 2/ film is formed directly on the GaAs surface by heat treatment, it was first necessary for the authors to study the effect of the treatment conditions on the electrochemical behavior of GaAs. The work shows that a TiO/sub 2/ film on GaAs caused the latter to photocorrode by sensitivity to visible light throughout the exposure. The preparation of high-quality pore-free films for this purpose is of considerable importance and, according to the authors, requires further study.

• Research Organization: Institute of Inorganic and Physical Chemistry, Academy of Sciences of the AzerSSR, Baku
• OSTI ID: 5237090
• Journal Information: Sov. Electrochem. (Engl. Transl.); (United States), Journal Name: Sov. Electrochem. (Engl. Transl.); (United States) Vol. 21:3; ISSN SOECA
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
36 MATERIALS SCIENCE
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
400500 -- Photochemistry
ARSENIC COMPOUNDS
ARSENIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COATINGS
CORROSION
CORROSION PROTECTION
CORROSION RESISTANCE
DEPOSITION
ELECTROCHEMICAL CELLS
ELECTROLYSIS
ELECTROLYTIC CELLS
EQUIPMENT
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
HEAT TREATMENTS
HYDROGEN COMPOUNDS
LYSIS
MATERIALS
N-TYPE CONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTROCHEMICAL CELLS
PHOTOELECTROLYSIS
PHOTOELECTROLYTIC CELLS
PNICTIDES
PROTECTIVE COATINGS
SEMICONDUCTOR MATERIALS
SOLAR EQUIPMENT
SURFACE COATING
TEMPERATURE EFFECTS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WATER