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  1. 1 Acta Physica Polonica A

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  1. 1 2018

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  1. 1 Chukova O.

  2. 1 Nedilko S.

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Luminescent Spectroscopy of the Yb³⁺ Ions in the PbWO₄ Crystal

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Chukova O., Nedilko S.
Acta Physica Polonica A
|
2018
|
vol. 133
|
issue 4
918-922
EN
Luminescent properties of the PbWO₄ crystals undoped and doped with the Yb³⁺ ions were studied. Emission spectra of the crystals consist of broadband matrix emission in 350-750 nm spectral range and narrow spectral lines caused by inner electron transitions in the impurity Yb³⁺ ions in 920-1040 nm spectral range. Analysis of the linear spectra has shown that Yb³⁺ ions form two types of emission centres. Structures of these centers are discussed taking into account possibility of the impurity ions incorporation in different positions (Pb and W sites) in the crystal lattice. Effects of the Yb³⁺ impurities on matrix emission were studied. Transfer of excitation energy from matrix to the Yb³⁺ decreases intensity of the red band of matrix emission. The Yb³⁺ impurities also increase intensity of the blue band by formation of additional Yb³⁺-induced channel of excitation of this band. The described effects of Yb³⁺ doping on properties of matrix emission are caused by the Yb³⁺ ions arranged in Pb positions.
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