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Cathodoluminescence and Photoluminescence of YPO 4 :Pr 3+ , Y 2 SiO 5 :Pr 3+ , YBO 3 :Pr 3+ , and YPO 4 :Bi 3+

  • Broxtermann M
  • den Engelsen D
  • Fern G
  • et al.
ECS Journal of Solid State Science and Technology (2017) 6(4) R47-R52
DOI: 10.1149/2.0051704jss
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Abstract

Herein we describe the synthesis, characterization, and cathodoluminescence of the UV emitting phosphors YPO4:Pr3+, Y2SiO5:Pr3+, YBO3:Pr3+, and YPO4:Bi3+. These photoluminescent UV phosphors exhibited strong luminescence in the UV part of the electromagnetic spectrum when excited by electron bombardment. Spectra have been recorded between 210 and 650 nm at electron beam energies of 5, 10 and 15 keV. The energy efficiencies of YPO4:Pr3+, Y2SiO5:Pr3+, YBO3:Pr3+ and YPO4:Bi3+ in the UV range were 9.2%, 2.7%, 5.1%, and 7.2%, respectively at 15 keV. UV photoluminescence measurements were conducted using 160 nm excitation generated by combining a VUV monochromator with a deuterium lamp.

Figures

  • Figure 1. Measuring system of CL. The sample holder also contains ZnO:Zn powder which is used as a reference. CL is measured using a Jeti Radiometer in the visible part of the spectrum, the high resolution Bentham spectrometer is used to collect UV and visible radiation via a sapphire window. The sample holder can be moved horizontally.
  • Table I. PSD data of the as-synthesized UV-C emitting phosphors.
  • Figure 2. PXRDs of the as-synthesized samples compared to the reference patterns.17–19
  • Figure 3. SEM images of typical YPO4:Bi (a), YPO4:Pr (b), YBO3:Pr (c), and Y2SiO5:Pr (d) powders, in each case a 1 μm bar is shown.
  • Figure 5. CL spectrum of Y2SiO5:Pr3+. (a) between 210 nm and 350 nm at 1.4 μA/cm2. (b) between 350 and 650 nm at 1.0 μA/cm2, (in b the ordinate has been magnified 32 times).
  • Figure 4. CL spectrum of YPO4:Pr3+. (a) between 220 nm and 300 nm at 1.4 μA/cm2. (b) between 300 and 650 nm at 1.0 μA/cm2, (in b the ordinate has been magnified 100 times).
  • Figure 6. CL spectrum of YBO3:Pr3+. (a) between 210 nm and 350 nm at 1.4 μA/cm2. (b) between 350 and 650 nm at 1.0 μA/cm2, (in b the ordinate has been magnified 125 times).
  • Figure 7. CL spectrum of YPO4:Bi3+. (a) between 210 nm and 300 nm at 1.4 μA/cm2. (b) between 350 and 650 nm at 1.0 μA/cm2, (in b the ordinate has been magnified 500 times).

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APA

Broxtermann, M., den Engelsen, D., Fern, G. R., Harris, P., Ireland, T. G., Jüstel, T., & Silver, J. (2017). Cathodoluminescence and Photoluminescence of YPO 4 :Pr 3+ , Y 2 SiO 5 :Pr 3+ , YBO 3 :Pr 3+ , and YPO 4 :Bi 3+. ECS Journal of Solid State Science and Technology, 6(4), R47–R52. https://doi.org/10.1149/2.0051704jss

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