Near Infrared Quantum Cutting Luminescence of Er(3+)/Tm(3+) Ion Pairs in a Telluride Glass.

Author(s) Chen, X.; Li, S.; Hu, L.; Wang, K.; Zhao, G.; He, L.; Liu, J.; Yu, C.; Tao, J.; Lin, W.; Yang, G.; Salamo, G.J.
Journal Sci Rep
Date Published 2017 May 16

The multiphoton near-infrared, quantum cutting luminescence in Er(3+)/Tm(3+) co-doped telluride glass was studied. We found that the near-infrared 1800-nm luminescence intensity of (A) Er(3+)(8%)Tm(3+)(0.5%):telluride glass was approximately 4.4 to 19.5 times larger than that of (B) Tm(3+)(0.5%):telluride glass, and approximately 5.0 times larger than that of (C) Er(3+)(0.5%):telluride glass. Additionally, the infrared excitation spectra of the 1800 nm luminescence, as well as the visible excitation spectra of the 522 nm and 652 nm luminescence, of (A) Er(3+)(8%)Tm(3+)(0.5%):telluride glass are very similar to those of Er(3+) ions in (C) Er(3+)(0.5%):telluride glass, with respect to the shapes of their excitation spectral waveforms and peak wavelengths. Moreover, we found that there is a strong spectral overlap and energy transfer between the infrared luminescence of Er(3+) donor ions and the infrared absorption of Tm(3+) acceptor ions. The efficiency of this energy transfer {(4)I13/2(Er(3+)) → (4)I15/2(Er(3+)), (3)H6(Tm(3+)) → (3)F4(Tm(3+))} between the Er(3+) and Tm(3+) ions is approximately 69.8%. Therefore, we can conclude that the observed behaviour is an interesting multiphoton, near-infrared, quantum cutting luminescence phenomenon that occurs in novel Er(3+)-Tm(3+) ion pairs. These findings are significant for the development of next-generation environmentally friendly germanium solar cells, and near-to-mid infrared (1.8-2.0 μm) lasers pumped by GaN light emitting diodes.

DOI 10.1038/s41598-017-02244-8
ISSN 2045-2322
Citation Sci Rep. 2017;7(1):1976.

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