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

Title Near Infrared Quantum Cutting Luminescence of Er(3+)/Tm(3+) Ion Pairs in a Telluride Glass.
Authors X. Chen; S. Li; L. Hu; K. Wang; G. Zhao; L. He; J. Liu; C. Yu; J. Tao; W. Lin; G. Yang; G.J. Salamo
Journal Sci Rep
DOI 10.1038/s41598-017-02244-8
Abstract

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??m) lasers pumped by GaN light emitting diodes.

Citation X. Chen; S. Li; L. Hu; K. Wang; G. Zhao; L. He; J. Liu; C. Yu; J. Tao; W. Lin; G. Yang; G.J. Salamo.Near Infrared Quantum Cutting Luminescence of Er(3+)/Tm(3+) Ion Pairs in a Telluride Glass.. Sci Rep. 2017;7(1):1976. doi:10.1038/s41598-017-02244-8

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