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Proceedings Paper

Time-resolved luminescence, photocurrent, and simple reaction scheme for a folded ultrathin-layer solar cell (Invited Paper)
Author(s): Frank Willig; Reinhard Kietzmann; Klaus Schwarzburg
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Paper Abstract

In this paper the operation principles of a new folded ultra-thin-layer solar cell are being discussed. The cell was introduced recently by Graetzel and coworkers. The relationship between photocurrent and luminescence in this cell is derived for the simplest kinetic scheme appropriate for this type of solar cell. It involves three stages, i.e. four levels. In our simpel model these stages are connected by rate constants. We show picosecond time-resolved measurements of the luminescence decay curve and of the luminescence spectrum of the triplet state of the adsorbed trinuclear-Ruthenium dye molecules. Picosecond time-resolution of these signals is essential for distinguishing between relevant and irrelevant luminescence signals emitted from the cell. Moderately fast electron injection from the triplet state of this dye with 172 ps time constant yields very efficient conversion of absorbed photons to injected electrons. The time-response of the photocurrent is determined by the filling and emptying of traps in the depletion layer. We discuss the potential of this cell for the photovoltaic solar energy conversion.

Paper Details

Date Published: 9 December 1992
PDF: 13 pages
Proc. SPIE 1729, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry, (9 December 1992); doi: 10.1117/12.130564
Show Author Affiliations
Frank Willig, Max-Planck-Gesellschaft (Germany)
Reinhard Kietzmann, Max-Planck-Gesellschaft (Germany)
Klaus Schwarzburg, Max-Planck-Gesellschaft (Germany)


Published in SPIE Proceedings Vol. 1729:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry

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