Ultraviolet and blue cathodoluminescence from cubic Y2O3and Y2O3:Eu3+generated in a transmission electron microscope

Engelsen, Daniel den; Fern, George R.; Ireland, Terry G.; Harris, Paul G.; Hobson, P. R.; Lipman, Anthony L.; Dhillon, Rupinder; Marsh, Paul; Silver, Jack

doi:10.1039/c6tc01750a

Cited by 24 publications

(12 citation statements)

References 31 publications

(72 reference statements)

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“…This spectrum shows only the intrinsic blue emission of cubic Y 2 O 3 between 400 and 500 nm upon excitation with high energetic electrons. 21 From this spectrum it can be concluded that the large spherical particle did not contain the Eu-dopant; routinely a strong Eu 3+ emission would be observed from this sized particle. Another indication that this particle must be cubic Y 2 O 3 is the fact that 2% Eu 3+ will almost quench the intrinsic Y 2 O 3 emission.…”

Section: Resultsmentioning

confidence: 88%

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Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y₂O₃ and Y₂O₃:Eu³⁺

et al. 2016

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Section: Resultsmentioning

confidence: 88%

“…Another indication that this particle must be cubic Y 2 O 3 is the fact that 2% Eu 3+ will almost quench the intrinsic Y 2 O 3 emission. 21 The mere presence of this intrinsic emission is thus a proof that the particle is undoped Y 2 O 3 precursor. The evidence presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y₂O₃ and Y₂O₃:Eu³⁺

et al. 2016

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“…The details of this method have been described in Refs. 21,19. We have applied this method for the determination of the energy efficiency of the CL of the phosphors mentioned in the experimental section.…”

Section: Materials and Synthesis-powder Samples Of Y 3 Al 5 O 12 :Gd 3+mentioning

confidence: 99%

On the Photo- and Cathodoluminescence of LaB₃O₆:Gd,Bi, Y₃Al₅O₁₂:Pr, Y₃Al₅O₁₂:Gd, Lu₃Al₅O₁₂:Pr, and Lu₃Al₅O₁₂:Gd

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Engelsen

Jansen

et al. 2018

ECS J. Solid State Sci. Technol.

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Y 3 Al 5 O 12 (YAG) and Lu 3 Al 5 O 12 (LuAG) doped with rare earth elements are widely used as scintillators, solid state lasers, and phosphors in white light emitting diodes (LEDs). Additionally, (Gd,La)B 3 O 6 :Bi has found application as a UV-B emitting phosphor in fluorsecent lamps a long time ago. This paper reports both the photoluminescence (PL) and cathodoluminescence (CL) of Pr 3+ or Gd 3+ substituted YAG and LuAG in comparison to the widely applied UV-B phosphor (Gd,La)B 3 O 6 :Bi under vacuum ultra violet (VUV) and cathode ray excitation, respectively. The powder diffraction pattern, emission, excitation, and reflection spectra and a comparison of the luminescence efficiency are shown and discussed. It turned out that all investigated phosphors show efficient luminescence in the UV-B spectral range. Moreover, it is found that LuAG:Gd has the highest efficiency upon VUV and upon CL excitation too.

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“…Finally, the combination of microscopy and spectrometry in a transmission electron microscope (TEM) will be presented [21,22,23]. The JEOL TEM of Brunel University London was, when it was delivered, a unique instrument being equipped with a Vulcan TM CL detector of Gatan (Pleasanton, CA, USA) for imaging (panchromatic) and spectroscopic purposes.…”

Section: Introductionmentioning

confidence: 99%

New Developments in Cathodoluminescence Spectroscopy for the Study of Luminescent Materials

et al. 2017

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Herein, we describe three advanced techniques for cathodoluminescence (CL) spectroscopy that have recently been developed in our laboratories. The first is a new method to accurately determine the CL-efficiency of thin layers of phosphor powders. When a wide band phosphor with a band gap (Eg > 5 eV) is bombarded with electrons, charging of the phosphor particles will occur, which eventually leads to erroneous results in the determination of the luminous efficacy. To overcome this problem of charging, a comparison method has been developed, which enables accurate measurement of the current density of the electron beam. The study of CL from phosphor specimens in a scanning electron microscope (SEM) is the second subject to be treated. A detailed description of a measuring method to determine the overall decay time of single phosphor crystals in a SEM without beam blanking is presented. The third technique is based on the unique combination of microscopy and spectrometry in the transmission electron microscope (TEM) of Brunel University London (UK). This combination enables the recording of CL-spectra of nanometre-sized specimens and determining spatial variations in CL emission across individual particles by superimposing the scanning TEM and CL-images.

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Ultraviolet and blue cathodoluminescence from cubic Y₂O₃and Y₂O₃:Eu³⁺generated in a transmission electron microscope

Abstract: The investigation of cubic spherical submicron particles of non-doped Y2O3and Y2O3doped with Eu3+in a TEM using CL from individual particles is described.

Cited by 24 publications

References 31 publications

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y₂O₃ and Y₂O₃:Eu³⁺

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y₂O₃ and Y₂O₃:Eu³⁺

On the Photo- and Cathodoluminescence of LaB₃O₆:Gd,Bi, Y₃Al₅O₁₂:Pr, Y₃Al₅O₁₂:Gd, Lu₃Al₅O₁₂:Pr, and Lu₃Al₅O₁₂:Gd

New Developments in Cathodoluminescence Spectroscopy for the Study of Luminescent Materials

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Ultraviolet and blue cathodoluminescence from cubic Y2O3and Y2O3:Eu3+generated in a transmission electron microscope

Abstract: The investigation of cubic spherical submicron particles of non-doped Y2O3and Y2O3doped with Eu3+in a TEM using CL from individual particles is described.

Cited by 24 publications

References 31 publications

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y2O3 and Y2O3:Eu3+

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y2O3 and Y2O3:Eu3+

On the Photo- and Cathodoluminescence of LaB3O6:Gd,Bi, Y3Al5O12:Pr, Y3Al5O12:Gd, Lu3Al5O12:Pr, and Lu3Al5O12:Gd

New Developments in Cathodoluminescence Spectroscopy for the Study of Luminescent Materials

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Ultraviolet and blue cathodoluminescence from cubic Y₂O₃and Y₂O₃:Eu³⁺generated in a transmission electron microscope

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y₂O₃ and Y₂O₃:Eu³⁺

Photoluminescence, cathodoluminescence and micro-Raman investigations of monoclinic nanometre-sized Y₂O₃ and Y₂O₃:Eu³⁺

On the Photo- and Cathodoluminescence of LaB₃O₆:Gd,Bi, Y₃Al₅O₁₂:Pr, Y₃Al₅O₁₂:Gd, Lu₃Al₅O₁₂:Pr, and Lu₃Al₅O₁₂:Gd