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Upconversion to enhance silicon solar cell efficiency - detailed experimental analysis with both coherent monochromatic irradiation and white light illumination

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

Fulltext urn:nbn:de:0011-n-1563754 (184 KByte PDF)
MD5 Fingerprint: 2c7002b49999a0011e1135ce9f753aa5
Created on: 11.8.2012

European Commission:
25th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2010. Proceedings : 5th World Conference on Photovoltaic Energy Conversion, 6-10 , September 2010, Valencia, Spain
München: WIP-Renewable Energies, 2010
ISBN: 3-936338-26-4
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <25, 2010, Valencia>
World Conference on Photovoltaic Energy Conversion <5, 2010, Valencia>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Hochkonversion; Solarzellen - Entwicklung und Charakterisierung; Silicium-Photovoltaik; Farbstoff-; Organische und Neuartige Solarzellen; Alternative Photovoltaik-Technologien; Photonenmanagement; Industrielle und neuartige Solarzellenstrukturen; Neuartige Konzepte

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.