Enhanced Luminescence Performance of Cr-Doped CaMgSi<sub>2</sub>O<sub>6</sub> Phosphor via Alkali Metal Ion Codoping
Enhancing the luminous intensity of near-infrared (NIR) phosphors is critical for practical applications. This study demonstrates that codoping charge-compensating ions (Li+, Na+, and K+) significantly improves the fluorescence emission intensity and quantum efficiency of Cr3+-doped CaMgSi2O6 (CMSO:Cr) phosphors. Optimal enhancements were achieved with specific ion concentrations: the CMSO:0.01Cr phosphor codoped with 0.8 at. % Na2CO3 exhibited a 1.8-fold increase in emission intensity, while the CMSO:0.04Cr phosphor codoped with 1.5 at. % Li2CO3 demonstrated an 8-fold enhancement. Charge compensation also improved the internal quantum yield (IQY) and photoelectric conversion efficiency without compromising the thermal stability. Mechanistic insights from absorption/emission spectra, electron paramagnetic resonance (EPR), and fluorescence lifetime analyses revealed that alkali metal ions occupy defect sites, suppress nonradiative recombination, and simplify emission profiles by eliminating defect-induced luminescent centers.
Authors
- Zhoubin Lin (ORCID: https://orcid.org/0000-0003-3579-8297)
- Feifei Yuan (ORCID: https://orcid.org/0000-0003-1733-5969)
- Lehui Liu (ORCID: https://orcid.org/0000-0001-9079-2096)
- Lizhen Zhang (ORCID: https://orcid.org/0000-0003-4486-4153)
- Yisheng Huang
Institutions
- Advanced Materials Technology (United States) (US)
- Fujian Institute of Research on the Structure of Matter (CN)
- Xiamen Tungsten (China) (CN)
- Baotou Research Institute of Rare Earths (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Crystal Growth & Design
- Published
- 2025-09-03
- DOI
- https://doi.org/10.1021/acs.cgd.5c00964
- Citations
- 3
- Primary Topic
- Luminescence Properties of Advanced Materials
- Type
- article
- Field-Weighted Citation Impact
- 1.55
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Fujian Province