Low frequency capacitance measurements of photovoltaic cells based on microcrystalline chlorophyll a

Chouhaid Nasr; Surat Hotchandani; Roger M. Leblanc

doi:10.1007/BF02869961

Low frequency capacitance measurements of photovoltaic cells based on microcrystalline chlorophyll a

Chouhaid Nasr, Surat Hotchandani, Roger M. Leblanc

Chemistry

Research output: Contribution to journal › Article

5 Scopus citations

Abstract

Low-frequency capacitance measurements have been made to characterize aluminium/microcrystalline chlorophyll a/silver Schottky barrier photovoltaic cells. The cell shows a voltage-independent geometric capacitance at frequencies above 10Hz in dark. Linear Schottky plots are obtained only at low frequencies, ∼0.1 Hz, or under illumination of the cell with adequate intensity. This is explained by the fact that the depletion layer is mainly due to low-mobility trapped charges that are not able to follow the variations of the applied voltage at high frequencies. The light is believed to detrap and mobilize these trapped charges. From linear Schottky plots, various depletion parameters have been calculated in dark and under illumination.

Original language	English (US)
Pages (from-to)	699-708
Number of pages	10
Journal	Proceedings of the Indian Academy of Sciences - Chemical Sciences
Volume	107
Issue number	6
DOIs	https://doi.org/10.1007/BF02869961
State	Published - Dec 1 1995

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Keywords

capacitance measurements
Chlorophyll a
depletion layer
Schottky barrier
trapped charges

ASJC Scopus subject areas

Chemistry(all)

Cite this

Nasr, C., Hotchandani, S., & Leblanc, R. M. (1995). Low frequency capacitance measurements of photovoltaic cells based on microcrystalline chlorophyll a. Proceedings of the Indian Academy of Sciences - Chemical Sciences, 107(6), 699-708. https://doi.org/10.1007/BF02869961

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abstract = "Low-frequency capacitance measurements have been made to characterize aluminium/microcrystalline chlorophyll a/silver Schottky barrier photovoltaic cells. The cell shows a voltage-independent geometric capacitance at frequencies above 10Hz in dark. Linear Schottky plots are obtained only at low frequencies, ∼0.1 Hz, or under illumination of the cell with adequate intensity. This is explained by the fact that the depletion layer is mainly due to low-mobility trapped charges that are not able to follow the variations of the applied voltage at high frequencies. The light is believed to detrap and mobilize these trapped charges. From linear Schottky plots, various depletion parameters have been calculated in dark and under illumination.",

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N2 - Low-frequency capacitance measurements have been made to characterize aluminium/microcrystalline chlorophyll a/silver Schottky barrier photovoltaic cells. The cell shows a voltage-independent geometric capacitance at frequencies above 10Hz in dark. Linear Schottky plots are obtained only at low frequencies, ∼0.1 Hz, or under illumination of the cell with adequate intensity. This is explained by the fact that the depletion layer is mainly due to low-mobility trapped charges that are not able to follow the variations of the applied voltage at high frequencies. The light is believed to detrap and mobilize these trapped charges. From linear Schottky plots, various depletion parameters have been calculated in dark and under illumination.

AB - Low-frequency capacitance measurements have been made to characterize aluminium/microcrystalline chlorophyll a/silver Schottky barrier photovoltaic cells. The cell shows a voltage-independent geometric capacitance at frequencies above 10Hz in dark. Linear Schottky plots are obtained only at low frequencies, ∼0.1 Hz, or under illumination of the cell with adequate intensity. This is explained by the fact that the depletion layer is mainly due to low-mobility trapped charges that are not able to follow the variations of the applied voltage at high frequencies. The light is believed to detrap and mobilize these trapped charges. From linear Schottky plots, various depletion parameters have been calculated in dark and under illumination.

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10.1007/BF02869961