The chemical and mechanical pressure influence on chromium luminescence

Opis

In this study, we aim to compare the changes in the luminescence properties of Ga₂O₃:Cr³⁺ modified by Al or Sc ion substitution (chemical pressure) and hydrostatic pressure. We find the same behavior for Ga_2–xAl_xO₃:Cr³⁺ and different behavior for Ga_2–xSc_xO₃:Cr³⁺ in terms of the optical properties under chemical and mechanical pressure. We consider Al substitution, which does not affect the chemical bond angles in the Cr³⁺ local environment and changes the crystal volume, like mechanical pressure does. As confirmed by Raman spectroscopy, the Sc ions cause lattice distortion and influence the chemical bond lengths and angles in the Cr³⁺ local environment. The energy structure diagrams of all levels of the d³ configuration of the Cr³⁺ ion as a function of pressure are calculated by considering the pressure dependence of the Racah parameters. The energy structure diagrams presented in the paper show a decrease in the energy of the ²E, ²T₁, and ²T₂ excited levels with an increase in Dq. This does not align with the behavior predicted for these excited levels by the standard Tanabe–Sugano diagram. It seems correct that a high-pressure experiment involving Cr³⁺ and other transition metals should be interpreted using the method and diagrams presented herein.

In that dataset, raw data of excitation and emission spectra, and high-pressure dependence are provided

Related publication:

Majewska, N.; Muñoz, A.; Liu, R.-S.; Mahlik, S. Influence of Chemical and Mechanical Pressure on the Luminescence Properties of Near-Infrared Phosphors. Chem. Mater. 2023, 35 (12), 4680–4690. https://doi.org/10.1021/acs.chemmater.3c00203.

Funding: Data were produced under the Preludium 21 research project No. 2022/45/N/ST3/00576 financed by the National Science Centre Poland.

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Oprogramowanie:: OriginLab

Informacje szczegółowe

Rok publikacji:

2023

Data zatwierdzenia:

2023-12-14

Język danych badawczych:

angielski

Dyscypliny:

nauki fizyczne (Dziedzina nauk ścisłych i przyrodniczych)

DOI:

10.34808/hqcw-pj37

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