| Autor: |
Santos, J. F. M., Muniz, R. F., Savi, E., Junior, A. A. S., Schiavon, G. J., Medina, A. N., Rohling, J. H., Baesso, M. L., Lima, S. M., Andrade, L. H. C., Catunda, T., Nunes, L. A. O. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 1/21/2023, Vol. 133 Issue 3, p1-9, 9p |
| Abstrakt: |
Novel Eu2+,3+/Yb3+ co-doping calcium aluminosilicate glasses prepared under a vacuum atmosphere were developed and characterized from the spectroscopic point of view, as a potential spectral converter for application in solar cells. The emission of near-infrared photons by downconversion due to cooperative energy transfer (ET) from Eu2+ and Eu3+ to Yb3+ in these glasses was reported. Absorption, excitation, emission, and fluorescence decay measurements were performed to examine the ET processes. The occurrence of cooperative energy transfer from Eu2+ and/or Eu3+ to Yb3+ ions was discussed in detail. The obtained samples have high efficiency and broad absorption in the ultraviolet and visible regions. Under 325 nm excitation, the samples achieve intense near-infrared emission, which increases with Yb2O3 concentration (0 < Yb2O3 < 1.38 mol. %). The energy transfer efficiency from Eu2+,3+ to Yb3+ was evaluated, and a maximum efficiency of ∼85% was obtained (Yb2O3 = 1.38 mol. %). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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