Abstract
We confirmed methyl termination on n-Si(111) surface by ATR-FTIR measurement, which was fabricated by a photo chloro-reaction and its methylation. The coverage of the methylation was about 63.7%, and the surface was not re-terminated by hydrogen. Photoelectrochemical properties of the n-Si(111) were measured as an electrode for a photoelectrochemical cell, and an onset potential obtaining photocurrent for the methyl terminated n-Si(111) electrode was observed as negative shift at 70 mV comparing with that of the hydrogen terminated n-Si(111) electrode. Therefore, the negative shift would be expected for improving open circuit voltage towards solar cell.
Highlights
We have remarked photovoltaic power generation, and have produced higher efficiency solar cells by proceeding to the influential investigation
Higher open circuit voltage was discovered with n-Si photoelectrochemical cells (PEC) comparing with familiar p-n junction solar cell, and was able to fabricate them with low costs and ease
We investigated alkyl terminated n-Si surface by ATR-FTIR, which was known hardly to oxidate the surface in electrolyte solution, and we selected methyl base as the alkyl species and n-Si was measured about photoelectrochemical properties electrochemically as a working electrode by Pt eletrodeposition onto the surface
Summary
We have remarked photovoltaic power generation, and have produced higher efficiency solar cells by proceeding to the influential investigation. Those include great problems which take high costs to produce them by semiconductor fabrication processes as p-n junction and use of transparent conductive indium oxide etc. The alkyl termination on the Si surface is investigated toward developments of bio sensors for DNA and protein detection by giving functionalize on the surface [9], the termination is known to make the surface stable for the oxidation in the solution [4,10,11]. We designed the functional n-Si surface toward PEC in this study
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