A comparative study of GaSb (100) surface passivation by aqueous and nonaqueous solutions
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- Z. Y. Liu
- Department of Chemical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, 53706
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- T. F. Kuech
- Department of Chemical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, 53706
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- D. A. Saulys
- Materials Research Science and Engineering Center, University of Wisconsin-Madison, Madison, Wisconsin, 53706
書誌事項
- 公開日
- 2003-09-29
- DOI
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- 10.1063/1.1613994
- 公開者
- AIP Publishing
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説明
<jats:p>We report a nonaqueous passivation regime consisting of Na2S/benzene/15-crown-5/oxidant. The use of a nonpolar, aprotic organic medium required the addition of a specific chelating agent (15-crown-5) to solubilize sodium sulfide, and organic oxidizing agents (anthraquinone, benzophenone, etc.) to act as electron acceptors. The surface optical and chemical properties of GaSb surfaces after aqueous and nonaqueous sulfide treatments were compared. Nonaqueous passivation resulted in higher photoluminescence (PL) intensity, lower oxide content, and a less amount of elemental Sb than aqueous passivation. The PL intensity from passivated surfaces was correlated with the standard reduction potentials of electron acceptors.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 83 (13), 2587-2589, 2003-09-29
AIP Publishing
