Down-shifting by energy transfer in Dy3+-Tb3+ co-doped YF3-based sol-gel nano-glass-ceramics for photovoltaic applications

作者：Santana Alonso A; Yanes A C^*; Mendez Ramos J; del Castillo J; Rodriguez V D

来源：Optical Materials, 2011, 33(4): 587-591.

DOI：10.1016/j.optmat.2010.10.040

• Glass-ceramics
• Sol-gel
• Energy transfer

Highly transparent sot gel derived nano-glass-ceramics containing YF3 nanocrystals doped with Dy3+ or Tb3+ and co-doped with Dy3+-Tb3+ have been successfully developed. A structural analysis and luminescence spectra features confirmed the incorporation of rare-earth ions into precipitated YF3 nanocrystals, where efficient energy transfer from Dy3+ to Tb3+ takes place. Higher efficiency is obtained with increasing Tb3+ 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 Dy3+ and Tb3+ ions.

• 出版日期2011-2