Visible to infrared down conversion in rare-earth doped fluorides for luminescent solar converters

D. Serrano; A. Braud; J.-L. Doualan; P. Camy; R. Moncorgé

doi:10.1117/12.892711

20 September 2011 Visible to infrared down conversion in rare-earth doped fluorides for luminescent solar converters

D. Serrano, A. Braud, J.-L. Doualan, P. Camy, R. Moncorgé

Proceedings Volume 8111, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion II; 811104 (2011) https://doi.org/10.1117/12.892711
Event: SPIE Solar Energy + Technology, 2011, San Diego, California, United States

Abstract

Downconversion is investigated as a promising way to enhance silicon solar cells efficiency. The efficiency of the downconversion process is investigated for the (Pr³⁺, Yb³⁺) codoping in two fluoride hosts: KY₃F₁₀ and CaF₂. Strong near-infrared emission from ytterbium ions after excitation of praseodymium ions at 440 nm is observed in both KY₃F₁₀ and CaF₂ as a result of the efficient energy transfer from praseodymium to ytterbium. In particular, very high Pr³⁺ to Yb³⁺ energy transfer efficiencies (ETE) are achieved for low Yb³⁺ and Pr³⁺ concentrations (ETE=97% in CaF₂:0.5%Pr³⁺- 1%Yb³⁺) in CaF₂ in comparison with KY₃F₁₀. A low Yb³⁺ concentration offers the advantage to limit the Yb³⁺ concentration quenching which is observed in other hosts, where the Yb³⁺ concentration has to be larger to achieve a high ETE for solar cell applications.

Citation Download Citation

D. Serrano, A. Braud, J.-L. Doualan, P. Camy, and R. Moncorgé "Visible to infrared down conversion in rare-earth doped fluorides for luminescent solar converters", Proc. SPIE 8111, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion II, 811104 (20 September 2011); https://doi.org/10.1117/12.892711

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