DOI: 10.1111/j.1751-1097.1979.tb07831.x. PHOTOVOLTATC EFFICIENCIES OF MICROCRYSTALLINE AND ANHYDROUS CHLOROPHYLL <i>a</i>

PHOTOVOLTATC EFFICIENCIES OF MICROCRYSTALLINE AND ANHYDROUS CHLOROPHYLL a

10.1111/j.1751-1097.1979.tb07831.x

Crossref journal-article

Wiley

Photochemistry and Photobiology (311)

Abstract

Abstract— A thin layer of chlorophyll a (around 2000 Å). a p‐type organic semiconductor. was sandwiched between two different metals. aluminum and silver. We used the photovoltaic effect in order to study the efficiency of light conversion by the crystalline and anhydrous forms of Chl a. When the photovoltaic cell is illuminated through the semi‐transparent aluminum electrode. an action spectrum similar to the visible absorption spectrum of Chl a is obtained. The anhydrous form. always shows a maximum, in the red, at 672 nm and the crystalline one at 746 nm to 738 nm depending on the amount of water vapor present in the measuring area. The light conversion efficiency has been measured at the maximum absorption in the red for both forms of Chl a. For the anhydrous form, we found values as high as 0.036%, which is very significant even compared to 0.21%, the highest value found for the crystalline form. In both cases. the incident light power was approximately 10 μW on the cell. The light conversion efficiency of both forms of Chl a cells was found to depend on a combine effect of the nature of the gas (O1. N2. air. Ar. N2O. SF6, H2) and the amount of water vapor present in the measuring area. The best conversion efficiency was obtained with O2, or air saturated with water. This combined effect was very large for the crystalline form whereas the anhydrous form was only slightly affected.

Authors 3

J. P. Dodelet (first)
J. Le Brich (additional)
R. M. Leblanc (additional)

References 46 Referenced 40

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Dates

Type	When
Created	17 years, 8 months ago (Jan. 2, 2008, 6:27 p.m.)
Deposited	1 year, 10 months ago (Oct. 14, 2023, 3:57 p.m.)
Indexed	1 year ago (Sept. 2, 2024, 5:12 a.m.)
Issued	46 years, 3 months ago (June 1, 1979)
Published	46 years, 3 months ago (June 1, 1979)
Published Online	17 years, 8 months ago (Jan. 2, 2008)
Published Print	46 years, 3 months ago (June 1, 1979)

Funders 0

None

BibTeX

@article{Dodelet_1979, title={PHOTOVOLTATC EFFICIENCIES OF MICROCRYSTALLINE AND ANHYDROUS CHLOROPHYLL a}, volume={29}, ISSN={1751-1097}, url={http://dx.doi.org/10.1111/j.1751-1097.1979.tb07831.x}, DOI={10.1111/j.1751-1097.1979.tb07831.x}, number={6}, journal={Photochemistry and Photobiology}, publisher={Wiley}, author={Dodelet, J. P. and Brich, J. Le and Leblanc, R. M.}, year={1979}, month=jun, pages={1135–1145} }

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