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  4. Progress on up- and down-converted fluorescence in rare-doped fluorozirconate-based glass ceramics for high efficiency solar cells
 
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2010
Conference Paper
Titel

Progress on up- and down-converted fluorescence in rare-doped fluorozirconate-based glass ceramics for high efficiency solar cells

Abstract
Transparent glasses as up- or down-converters are attractive systems to increase the efficiency of solar cells. Er-doped fluorozirconate (FZ) glasses show an intense up-conversion upon excitation at 1540 nm. Transmission spectra show that the absorbance at 1540 nm grows linearly with the Er-doping level. In Eu-doped FZ glasses, which were additionally doped with chlorine ions, the growth of BaCl2 nanocrystals can be observed upon thermal annealing. For high annealing temperatures a phase change from hexagonal to orthorhombic phase BaCl2 can be seen. Upon excitation in the ultraviolet (UV) spectral range these glass ceramics emit an intense blue emission. A combination of a silicon solar cell and an Eu-doped FZ glass ceramic as a down-converting top layer shows an increase in the short circuit current in the UV spectral range compared to a solar cell without a down-converting top layer.
Author(s)
Schweizer, S.
Henke, B.
Ahrens, B.
Paßlick, C.
Miclea, P.T.
Wenzel, J.
Reisacher, E.
Pfeiffer, W.
Johnson, J.A.
Hauptwerk
Photonics for Solar Energy Systems III
Konferenz
Conference "Photonics for Solar Energy Systems" 2010
DOI
10.1117/12.853943
File(s)
001.pdf (3.93 MB)
Language
English
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Fraunhofer-Institut für Werkstoffmechanik IWM
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