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.
- OSTI ID:
- 22269581
- Journal Information:
- APL Materials, Vol. 1, Issue 6; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
- Country of Publication:
- United States
- Language:
- English
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