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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 12 — Jun. 15, 2012
  • pp: 2280–2282

Quantum cutting in CaYAlO4: Pr3+, Yb3+

A. Guille, A. Pereira, C. Martinet, and B. Moine  »View Author Affiliations


Optics Letters, Vol. 37, Issue 12, pp. 2280-2282 (2012)
http://dx.doi.org/10.1364/OL.37.002280


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Abstract

The deposition of a thin layer of a quantum-cutter material on top of silicon-based solar cells seems to be a promising solution to reduce the thermalization losses. This mechanism has been reported in materials codoped with Pr3+Yb3+, where Pr3+ can sensitize two Yb3+ ions for one absorbed blue photon. In the present Letter, we analyze precisely energy transfers between Pr3+ and Yb3+ in CaYAlO4, and we measure a quantum-cutting rate of 145%. We show that a very efficient back transfer from Yb3+ toward the G41 level of Pr3+ ion leads to a strong reduction of the quantum yield.

© 2012 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(300.2140) Spectroscopy : Emission

ToC Category:
Materials

History
Original Manuscript: February 16, 2012
Revised Manuscript: April 5, 2012
Manuscript Accepted: April 5, 2012
Published: June 7, 2012

Citation
A. Guille, A. Pereira, C. Martinet, and B. Moine, "Quantum cutting in CaYAlO4: Pr3+, Yb3+," Opt. Lett. 37, 2280-2282 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-12-2280


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