THE ANODIC-DISSOLUTION OF INP STUDIED BY THE OPTOELECTRICAL IMPEDANCE METHOD .2. INTERACTION BETWEEN ANODIC AND CHEMICAL ETCHING OF INP IN IODIC ACID-SOLUTIONS
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VERMEIR, IE
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UNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDSUNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDS
VERMEIR, IE
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GOMES, WP
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UNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDSUNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDS
GOMES, WP
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ERNE, BH
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UNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDSUNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDS
ERNE, BH
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VANMAEKELBERGH, D
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UNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDSUNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDS
VANMAEKELBERGH, D
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[1] UNIV UTRECHT,DEBYE RES INST,3508 TA UTRECHT,NETHERLANDS
The photocurrent enhancement by HIO3 at the n-InP anode was studied by a combination of dc and optoelectrical impedance measurements. It was found that this enhancement is connected with the anodic dissolution of the semiconductor itself. A reaction scheme is proposed for the dissolution mechanism, involving two competing reaction pathways, ie a mixed chemical-electrochemical and a purely electrochemical one, each with chemically different decomposition intermediates.