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 |
|---|---|
| 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 | |
| State | Published - Dec 1 1995 |
| Externally published | Yes |
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Keywords
- capacitance measurements
- Chlorophyll a
- depletion layer
- Schottky barrier
- trapped charges
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Low frequency capacitance measurements of photovoltaic cells based on microcrystalline chlorophyll a. / Nasr, Chouhaid; Hotchandani, Surat; Leblanc, Roger.
In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, Vol. 107, No. 6, 01.12.1995, p. 699-708.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Low frequency capacitance measurements of photovoltaic cells based on microcrystalline chlorophyll a
AU - Nasr, Chouhaid
AU - Hotchandani, Surat
AU - Leblanc, Roger
PY - 1995/12/1
Y1 - 1995/12/1
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.
KW - capacitance measurements
KW - Chlorophyll a
KW - depletion layer
KW - Schottky barrier
KW - trapped charges
UR - http://www.scopus.com/inward/record.url?scp=0029490867&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029490867&partnerID=8YFLogxK
U2 - 10.1007/BF02869961
DO - 10.1007/BF02869961
M3 - Article
VL - 107
SP - 699
EP - 708
JO - Proceedings of the Indian Academy of Sciences - Section A
JF - Proceedings of the Indian Academy of Sciences - Section A
SN - 0370-0089
IS - 6
ER -