Photovoltaic characteristics of BR/p-silicon heterostructures using surface photovoltage spectroscopy
- 1 July 2001
- journal article
- Published by American Vacuum Society in Journal of Vacuum Science & Technology A
- Vol. 19 (4), 1037-1041
- https://doi.org/10.1116/1.1369785
Abstract
Purple membrane (PM) monolayers were deposited on hydrophilic or hydrophobicsilicon substrates through the Langmuir–Blodgett (LB) technique. The photovoltaic features and interfacial charge separation of p-Si/PM/indium tin oxide (ITO) heterostructure were studied by surface photovoltage spectroscopy (SPS). The different photovoltaic response values were obtained due to the nonrandom orientation of PM in the LB films on the hydrophilic versus hydrophobicsilicon substrates. The photovoltaic response value versus external potential of the p-Si/cytoplasmic-extracellular/ITO heterostructure showed an obviously rectifying behavior. Compared with the p-Si/ITO heterostructure, the response value of SPS increased more rapidly in the case of the positive external bias.Keywords
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