Down-shifting by energy transfer in Dy3+–Tb3+ co-doped YF3-based sol–gel nano-glass-ceramics for photovoltaic applications
✍ Scribed by A. Santana-Alonso; A.C. Yanes; J. Méndez-Ramos; J. del-Castillo; V.D. Rodríguez
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 705 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0925-3467
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✦ Synopsis
Highly transparent sol-gel derived nano-glass-ceramics containing YF 3 nanocrystals doped with Dy 3+ or Tb 3+ and co-doped with Dy 3+ -Tb 3+ have been successfully developed. A structural analysis and luminescence spectra features confirmed the incorporation of rare-earth ions into precipitated YF 3 nanocrystals, where efficient energy transfer from Dy 3+ to Tb 3+ takes place. Higher efficiency is obtained with increasing Tb 3+ concentration, and no quenching effects are observed. Observed luminescence features leads the way to enhance solar cell spectral response by down-shifting of the incident solar spectrum, with an extended absorption range from 300 to 500 nm, yielding to a predominant green emission by co-doping with Dy 3+ and Tb 3+ ions.