Initial Phase of Photoelectrochemical Conditioning of Silicon in Alkaline Media: Surface Chemistry and Topography
Initial Phase of Photoelectrochemical Conditioning of Silicon in Alkaline Media: Surface Chemistry and Topography
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碱性介质中硅光电化学调节的初始阶段:表面化学和形貌
DOI:
10.1021/jp401853p
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发表时间:
2013
影响因子:
3.7
通讯作者:
H.-J. Lewerenz
中科院分区:
文献类型:
--
作者:
M. Lettilly;K. Skorupska;Z. Huang;H.-J. Lewerenz
Oxidation and dissolution phenomena of Si(111) in alkaline electrolyte are investigated by a combination of photoelectrochemistry, scanning probe microscopy (SPM), transmission electron microscopy (TEM) andin-systemsynchrotron radiation photoelectron spectroscopy (SRPES). The surface topography in the initial anodic potential regime shows the formation of mesoscale pores with widths in the range 300–500 nm and partial surface oxidation. The surface chemistry assessment by SRPES shows patchy silicon oxide growth, suboxides, and remnants of the former hydrogen terminated surface areas. The use of the obtained self-organized nanostructures for application in nanoemitter photocatalytic solar cells is discussed. The necessary requirements regarding the total surface area of electrocatalysts needed to sustain the current density due to light-induced excess minority carriers in conjunction with the exchange current density of the considered heterogeneous catalysts is discussed.
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DOI:
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发表时间:
1995
期刊:
影响因子:
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作者:
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1987
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Annual Review of Biophysics and Biophysical Chemistry
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2008
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影响因子:
4.3
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1993
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通讯作者:
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