Applied Physics B

, Volume 96, Issue 1, pp 51–55

Cooperative downconversion and near-infrared luminescence of Tb3+–Yb3+ codoped lanthanum borogermanate glasses

  • X. Liu
  • S. Ye
  • Y. Qiao
  • G. Dong
  • B. Zhu
  • D. Chen
  • G. Lakshminarayana
  • J. Qiu
Article

DOI: 10.1007/s00340-009-3478-z

Cite this article as:
Liu, X., Ye, S., Qiao, Y. et al. Appl. Phys. B (2009) 96: 51. doi:10.1007/s00340-009-3478-z

Abstract

In the present paper, we investigate the near-infrared (NIR) luminescence of Tb3+–Yb3+ codoped lanthanum borogermanate (LBG) glasses under visible and ultraviolet light excitation. The results indicate that NIR quantum cutting occurs through cooperative energy transfer from Tb3+ to Yb3+ ions when only 4f8 levels of Tb3+ ions are excited in the wavelength region of 300–490 nm. The highest quantum efficiency under the excitation 5D4 level of Tb3+ at 484 nm is 146%. Ultraviolet excitation that populates the charge transfer band (CTB) of Yb3+ near 270 nm does not result in quantum cutting as the fast nonradiative decay from CTB to 2F5/2 level dominates. These materials are expected to be used as a converting layer for silicon solar cells to enhance their efficiency by splitting each high-energy photon into two NIR photons.

PACS

78.55.Qr61.72.up

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • X. Liu
    • 1
    • 2
  • S. Ye
    • 3
  • Y. Qiao
    • 1
    • 2
  • G. Dong
    • 1
    • 2
  • B. Zhu
    • 3
  • D. Chen
    • 2
  • G. Lakshminarayana
    • 3
  • J. Qiu
    • 3
  1. 1.State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiP.R. China
  2. 2.Graduate School of the Chinese Academy of SciencesBeijingP.R. China
  3. 3.State Key Laboratory of Silicon MaterialsZhejiang UniversityHangzhouP.R. China