Related Experiment Video
Updated: Jun 29, 2026
15:58
Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
5.9K
Modulating the Afterglow Time of Mn2+ Doped Metal Halides and Applications in Advanced Optical Information Encryption
Yu-Lin Hu1, Yi-Lin Zhu1, Shi-Ying Gu2
1School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China.
Nanomaterials (Basel, Switzerland)
|July 12, 2025
Summary
This study explores Mn2+-doped Cs2Na0.2Ag0.8InCl6, a promising afterglow material. The Mn2+ concentration was found to modulate afterglow time, enabling optical information storage applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Luminescence
Background:
- Metal halide phosphors offer low-cost afterglow properties for various applications.
- The precise afterglow mechanisms in Mn2+-doped materials require further elucidation.
- Controlling afterglow duration is crucial for advanced optical applications.
Purpose of the Study:
- To investigate the influence of Mn2+ concentration on the afterglow properties of Cs2Na0.2Ag0.8InCl6.
- To elucidate the afterglow mechanism in this material.
- To demonstrate a potential application in optical information storage.
Main Methods:
- Facile solution reaction synthesis of Mn2+-doped Cs2Na0.2Ag0.8InCl6.
- Systematic variation of Mn2+ doping concentration (y%).
- Photoluminescence spectroscopy and afterglow decay measurements.
Main Results:
- Afterglow time of Cs2Na0.2Ag0.8InCl6:y%Mn was modulated by Mn2+ concentration, ranging from 350 s to 530 s and down to 230 s.
- A maximum afterglow time of 530 s was achieved at y = 40.
- The mechanism involves interstitial Ag+ storing electrons, with excessive Mn2+ introducing nonradiative traps.
Conclusions:
- Mn2+ doping concentration is a key factor in tuning the afterglow duration of Cs2Na0.2Ag0.8InCl6.
- The proposed mechanism explains the observed afterglow modulation.
- The material demonstrates potential for dynamic optical information storage and encryption.
Related Concept Videos
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...