Open AccessMethyl Termination and ATR-FTIR Evaluation of n-Si(111) Electrode towards Photoelectrochemical Cell Fabrication
Author(s) -
Toshihito Ohtake
Publication year - 2013
Publication title -
journal of surface engineered materials and advanced technology
Language(s) - English
Resource type - Journals
eISSN - 2161-489X
pISSN - 2161-4881
DOI - 10.4236/jsemat.2013.33022
Subject(s) - photocurrent , electrode , materials science , photoelectrochemical cell , fourier transform infrared spectroscopy , solar cell , reversible hydrogen electrode , hydrogen , silicon , open circuit voltage , analytical chemistry (journal) , reference electrode , chemistry , optoelectronics , chemical engineering , voltage , electrochemistry , electrolyte , electrical engineering , organic chemistry , engineering
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.
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