Nonstoichiometric Defect Engineering in Mn2+‐Doped MgGa2O4 Persistent Phosphors Toward Enhanced Luminescence and Multimodal Optical Manometry
- 1School of Physical Science and Technology Ningbo University Ningbo Zhejiang China
- 2School of Applied Physics and Materials Wuyi University Jiangmen Guangdong China
- 3Faculty of Chemistry Adam Mickiewicz University Poznań Poland
Abstract
Mn2+‐doped MgGa2O4 persistent phosphors were synthesized through a nonstoichiometric engineering strategy to precisely regulate their luminescence properties. By introducing Mg2+ deficiency, the luminescence intensity, thermal stability and persistent luminescence performance are simultaneously enhanced, enabling their potential application in optical anti‐counterfeiting. Furthermore, the in situ high‐pressure X‐ray diffraction measurements demonstrate the excellent structural robustness of the designed phosphors over the investigated pressure range, indicating their suitability for high‐pressure manometry. Upon compression, the resultant phosphors exhibit pronounced pressure‐induced spectral red‐shift, enabling tunable luminescence and visualized pressure sensing. Notably, compared with the stoichiometric counterpart, the Mg2+‐deficient phosphors display significantly enhanced pressure responsiveness, resulting in improved optical manometric performance with higher sensitivity and an extended working pressure range. Specifically, within a broad pressure range of 0–30 GPa, the Mg0.939Ga2O4:Mn2+ phosphor achieve pressure sensitivities of 5.01 and 2.29 nm GPa−1 based on the emission band centroid and full width at half maximum, respectively. Additionally, the developed phosphors exhibit good colorimetric pressure sensing capability, reaching a maximum relative sensitivity of 12.71% GPa−1. These results demonstrate that the optical properties of the Mn2+‐doped MgGa2O4 phosphors can be effectively modulated through the synergistic regulation of nonstoichiometric engineering and pressure, highlighting their application potential in optical anti‐counterfeiting and multimodal manometry.
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BibTeX
@article{du2026nonstoichiometric,
title = {{Nonstoichiometric Defect Engineering in Mn2+‐Doped MgGa2O4 Persistent Phosphors Toward Enhanced Luminescence and Multimodal Optical Manometry}},
author = {Peng Du and Yifei Yu and Yue Guo and Przemysław Woźny and Shualing Ma and Laihui Luo and Marcin Runowski},
journal = {Advanced Science},
year = {2026},
month = nov,
doi = {10.1002/advs.78629},
url = {https://doi.org/10.1002/advs.78629},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Nonstoichiometric Defect Engineering in Mn2+‐Doped MgGa2O4 Persistent Phosphors Toward Enhanced Luminescence and Multimodal Optical Manometry
AU - Peng Du
AU - Yifei Yu
AU - Yue Guo
AU - Przemysław Woźny
AU - Shualing Ma
AU - Laihui Luo
AU - Marcin Runowski
PY - 2026
DA - 2026/11/03
JO - Advanced Science
DO - 10.1002/advs.78629
UR - https://doi.org/10.1002/advs.78629
AB - Mn2+‐doped MgGa2O4 persistent phosphors were synthesized through a nonstoichiometric engineering strategy to precisely regulate their luminescence properties. By introducing Mg2+ deficiency, the luminescence intensity, thermal stability and persistent luminescence performance are simultaneously enhanced, enabling their potential application in optical anti‐counterfeiting. Furthermore, the in situ high‐pressure X‐ray diffraction measurements demonstrate the excellent structural robustness of the designed phosphors over the investigated pressure range, indicating their suitability for high‐pressure manometry. Upon compression, the resultant phosphors exhibit pronounced pressure‐induced spectral red‐shift, enabling tunable luminescence and visualized pressure sensing. Notably, compared with the stoichiometric counterpart, the Mg2+‐deficient phosphors display significantly enhanced pressure responsiveness, resulting in improved optical manometric performance with higher sensitivity and an extended working pressure range. Specifically, within a broad pressure range of 0–30 GPa, the Mg0.939Ga2O4:Mn2+ phosphor achieve pressure sensitivities of 5.01 and 2.29 nm GPa−1 based on the emission band centroid and full width at half maximum, respectively. Additionally, the developed phosphors exhibit good colorimetric pressure sensing capability, reaching a maximum relative sensitivity of 12.71% GPa−1. These results demonstrate that the optical properties of the Mn2+‐doped MgGa2O4 phosphors can be effectively modulated through the synergistic regulation of nonstoichiometric engineering and pressure, highlighting their application potential in optical anti‐counterfeiting and multimodal manometry.
SN - 2198-3844
ER -