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The composition of anodic oxide films on InAs crystals

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The elemental and chemical composition distribution over the indium arsenide anodic oxide films (AOF) thickness created by anodic oxidation in a galvanostatic mode at two current density values in an electrolyte containing fluoride ions are studied by X-ray photoelectron spectroscopy. The received data indicate that AOF consist of the fluoride-oxygen compounds of In and As (In and As oxyfluorides) and indium oxide (In2O3). Fluorine is accumulated near InAs-AOF boundary. Increasing of the current density from 0.05 to 0.5 mA/cm2 at constant value of both forming voltage and electrolyte composition leads to fluorine concentration near AOF-InAs boundary increasing approximately in 3 times. In turn, the forming voltage increasing at fixed current density also increases the fluorine concentration near InAs-AOF boundary but in less extent: with forming voltage increasing on 5 V more the fluorine content in the bulk AOF increases in ~1.2 and ~1.5 times at current densities of 0.05 and 0.5 mA/cm2, respectively. Thus, it is possible to change fluorine content near AOF--InAs boundary at constant fluorine-containing components concentration in initial electrolyte by varying current density and forming voltage of anodic oxidation.

About the Authors

A. V. Artamonov
JSC «Shvabe-Photosystems», Moscow, 117545
Russian Federation

V. P. Astakhov
JSC «Shvabe-Photosystems», Moscow, 117545
Russian Federation

I. B. Varlashov
National Research University «MEI», Moscow, 111250
Russian Federation

N. I. Evstaf’Eva
JSC «Shvabe-Photosystems», Moscow, 117545
Russian Federation

P. V. Mitasov
National Research University «MEI», Moscow, 111250
Russian Federation


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For citations:

Artamonov A.V., Astakhov V.P., Varlashov I.B., Evstaf’Eva N.I., Mitasov P.V. The composition of anodic oxide films on InAs crystals. Fine Chemical Technologies. 2015;10(5):13-18. (In Russ.)

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