Broadband spectral conversion of visible light to near-infrared emission via energy transfer from Ce~3+ to Nd~3+/Yb~3+ in YAG

摘要

Broadband spectral conversion from visible light to near-infrared radiation in Ce~3+-Nd~3+/Yb~3+ codoped yttrium aluminum garnet is reported. Excitation, emission spectra, and decay curves have been measured to prove the energy transfer from Ce~3+ to Nd~3+ or Yb~3+. The energy transfer efficiencies have been estimated, and the mechanisms of the energy transfer between Ce~3+ and Nd~3+/Yb~3+ have been proposed. Ce~3+-Nd~3+ codoped YAG can obtain more effective emission in the desired near-infrared region (around 1100 nm) through broadband conversion, showing potential application to improve the conversion efficiency of Si solar cells.