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Title: NaLaF{sub 4}:Pr{sup 3+},Yb{sup 3+}, an efficient blue to near infra-red quantum cutter

In order to reduce the thermalization losses in solar cells, down-conversion of blue photons into near infra-red photons is a promising solution. In the present paper, we analyse the energy transfer processes between Pr{sup 3+} and Yb{sup 3+} in NaLaF{sub 4} and we show that an efficient quantum-cutting process occurs. Nevertheless, we also show that a back transfer from Yb{sup 3+} toward the {sup 1}G{sub 4} level of Pr{sup 3+} ion leading to emission beyond 1 μm reduces the potentiality of this material as a quantum cutter for Si solar cells.
Authors:
; ;  [1]
  1. Université Lyon 1, CNRS UMR 5306, Institut Lumière Matière, Université de Lyon, F-69622 Villeurbanne (France)
Publication Date:
OSTI Identifier:
22269581
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL Materials; Journal Volume: 1; Journal Issue: 6; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 36 MATERIALS SCIENCE; EMISSION; ENERGY TRANSFER; PHOTONS; PRASEODYMIUM IONS; SOLAR CELLS; THERMALIZATION; YTTERBIUM IONS