OBSERVATION OF THE POTENTIAL-DEPENDENT 2ND-HARMONIC RESPONSE FROM THE SI(111)/ELECTROLYTE AND SI(111)/SIO2/ELECTROLYTE INTERFACIAL REGIONS

被引：20

作者：

DASCHBACH, JL ^{[1
]}

FISCHER, PR ^{[1
]}

GRAGSON, DE ^{[1
]}

DEMAREST, D ^{[1
]}

RICHMOND, GL ^{[1
]}

机构：

[1] UNIV OREGON,DEPT CHEM,EUGENE,OR 97403

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 10期

关键词：

D O I：

10.1021/j100010a040

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The optical second harmonic (SH) response from the n-Si(111) surface immersed in aqueous electrolyte solutions has been examined and is observed to be potential dependent. This potential dependence is observed for both the monohydrogen-terminated surface immersed in NH4F as well as for surfaces which are photoanodically oxidized in H2SO4. The potential dependence from the latter is screened in part by the presence of the insulating overlayer. Furthermore, a minimum is observed in the potential-dependent response which is shifted well anodic of the flatband potential. The SH observations are attributed to field effects within the space charge region of the semiconductor which are manifested in the higher order bulk SH response. Photocurrent transient analysis is utilized as a means of determining the flatband potential of these surfaces immersed in electrolyte solution. Experiments performed in UHV are discussed and compared to that observed in solution.

引用

页码：3240 / 3250

页数：11

共 71 条

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