Abstract
A two-step chlorination/alkylation method was used to introduce -CnH2n+1 (n = 1-6) functionality onto single-crystal, (111)-oriented, n-type Si surfaces. H-terminated Si photoanodes were unstable under illumination in contact with an aqueous 0.35 M K4Fe(CN)6-0.05 M K3Fe(CN)6 electrolyte. Such electrodes displayed low open-circuit voltages and exhibited a pronounced time-dependent deterioration in their current density vs potential characteristics due to anodic oxidation. In contrast, Si surfaces functionalized with -CH3 and -C2H5 groups displayed significant improvements in stability while displaying excellent electrochemical properties when used as photoelectrodes in the aqueous Fe(CN)63-/4- electrolyte.
| Original language | English |
|---|---|
| Pages (from-to) | 4058-4060 |
| Number of pages | 3 |
| Journal | Journal of Physical Chemistry B |
| Volume | 102 |
| Issue number | 21 |
| Publication status | Published - May 21 1998 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
Cite this
Bansal, A., & Lewis, N. S. (1998). Stabilization of Si photoanodes in aqueous electrolytes through surface alkylation. Journal of Physical Chemistry B, 102(21), 4058-4060.