Issue 29, 2024

Relationship between the bandgap energy and photoluminescence properties of Pr3+-activated complex perovskite oxides by cation–nitrogen substitution

Abstract

The photoluminescence properties of f–f emission-type phosphors strongly depend on the electronic structure of the host materials. This study investigated in detail the relationship between the bandgap energy and the photoluminescence properties of Pr3+-activated CaTa2/3Mg1/3O3–CaTaO2N solid solutions. Ca3Ta3−xMgxO6+3xN3−3x (0.00 ≦ x ≦ 1.00) were chosen as the host materials for the approach used herein. The bandgap energy level (Eg) for the Ca3Ta3−xMgxO6+3xN3−3x solid solutions was systematically changed from 2.7 to 5.1 eV by controlling the Mg/Ta and O/N ratios. The photoluminescence excitation and emission control was systematically performed by engineering Eg for the samples. In the excitation spectra, the maximum photoluminescence excitation wavelength shifted to a shorter wavelength according to the Eg expansion. In the emission spectra, the red emission assigned to the 1D23H4 levels of Pr3+ in the samples with x = 0.25–0.50 could be excited in near-UV light regions (350 nm) when the Eg in the host materials was adjusted to approximately 3.0 eV. Conversely, several emissions, including a green emission belonging to the 3P03H4 levels of Pr3+, were observed when the Eg of the samples with x = 0.75–0.95 became larger than 3.0 eV. The results indicate that the photoluminescence properties of the f–f emission-type phosphors are attributed to the Eg in the host materials.

Graphical abstract: Relationship between the bandgap energy and photoluminescence properties of Pr3+-activated complex perovskite oxides by cation–nitrogen substitution

Supplementary files

Article information

Article type
Paper
Submitted
11 Dec 2023
Accepted
25 Jun 2024
First published
25 Jun 2024

New J. Chem., 2024,48, 12912-12918

Relationship between the bandgap energy and photoluminescence properties of Pr3+-activated complex perovskite oxides by cation–nitrogen substitution

S. Noda, Y. Sato, T. Hasegawa, M. Kakihana and S. Yin, New J. Chem., 2024, 48, 12912 DOI: 10.1039/D3NJ05682A

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