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Upconversion to Enhance Silicon Solar Cell Efficiency - Detailed Experimental Analysis with Both Coherent Monochromatic Irradiation and White Light Illumination

descriptionPublicationkeyboard_double_arrow_right Article , Conference object 01 Jan 2010 Germany English Publisher:WIP-Munich

Authors: Goldschmidt, J.C.; Fischer, S.; Löper, P.; Krämer, K.W.; Biner, D.; Hermle, M.; Glunz, S.W.;

doi: 10.4229/25theupvsec2010-1co.6.5

Upconversion to Enhance Silicon Solar Cell Efficiency - Detailed Experimental Analysis with Both Coherent Monochromatic Irradiation and White Light Illumination

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Abstract

Upconversion (UC) of sub-band-gap photons is a promising approach to increase solar cell efficiencies, because it makes these sub-band-gap photons useful as well. We investigate the application of -NaYF4:20% Er3+ to silicon solar cells. We determine the external quantum efficiency of an UC silicon solar cell, both under monochromatic excitation and under white light illumination. We demonstrate that an UC silicon solar cell responds under white light with an average UC efficiency of 1.07 ± 0.13% in the spectral range from 1460 to 1600 nm. Concepts are discussed how the narrow absorption range of the UC material can be overcome.

25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 229-233

Country

Germany

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Keywords

Neuartige Konzepte, Advanced Photovoltaics: New Concepts and Ultra-high Efficiency, Farbstoff-, Alternative Photovoltaik-Technologien, Silicium-Photovoltaik, Photonenmanagement, Organische und Neuartige Solarzellen, Industrielle und neuartige Solarzellenstrukturen, New Materials, Cells and Modules, Solarzellen - Entwicklung und Charakterisierung

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