Advances in up- and down-converted fluorescence for high efficiency solar cells using rare-earth doped fluorozirconate-based glasses and glass ceramics

Christian Paßlick; Bastian Henke; István Császár; Bernd Ahrens; Paul-T. Miclea; Jacqueline A. Johnson; Stefan Schweizer

doi:10.1117/12.860196

24 August 2010 Advances in up- and down-converted fluorescence for high efficiency solar cells using rare-earth doped fluorozirconate-based glasses and glass ceramics

Christian Paßlick, Bastian Henke, István Császár, Bernd Ahrens, Paul-T. Miclea, Jacqueline A. Johnson, Stefan Schweizer

Author Affiliations +

Proceedings Volume 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion; 77720A (2010) https://doi.org/10.1117/12.860196
Event: SPIE Solar Energy + Technology, 2010, San Diego, California, United States

Abstract

Transparent, rare-earth doped fluorozirconate-based glasses and glass ceramics are attractive systems as up- and downconverters to increase solar cell efficiency. For down-conversion applications, the efficiency of a silicon solar cell could be significantly increased in the ultraviolet spectral range by placing a europium-doped glass ceramic on top. High transparency is a key issue here to avoid scattering losses and to obtain high light output. Transmission spectra of fluorozirconate glasses, which were additionally doped with chlorine ions to initiate the growth of BaCl₂ nanoparticles therein upon thermal annealing, show that the absorbance in the visible spectral depends significantly on the annealing conditions. For up-conversion applications, erbium-doped fluorozironate glasses have been investigated. 2-dimensional intensity mapping of the up-converted fluorescence yielded information on the homogeneity of the glass sample and the erbium distribution therein. Depth scan experiments showed that the position of the focus of the excitation laser beam plays a crucial role since saturation of the 2-photon up-conversion occurs for high excitation power.

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Christian Paßlick, Bastian Henke, István Császár, Bernd Ahrens, Paul-T. Miclea, Jacqueline A. Johnson, and Stefan Schweizer "Advances in up- and down-converted fluorescence for high efficiency solar cells using rare-earth doped fluorozirconate-based glasses and glass ceramics", Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 77720A (24 August 2010); https://doi.org/10.1117/12.860196

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