Density functional theory facilitates heterovalent substitution: The multi-functional application of near-infrared emitting phosphors with excellent thermal stability
Because of the distinct electronic structure and modifiable luminescence properties, the trivalent chromium ion (Cr3 +) has emerged as the main subject of near-infrared phosphor research. In this study, the Sr8ZnSc(PO4)7:Cr3+ near-infrared emitting phosphor was successfully synthesized via the high-...
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Published in | Journal of alloys and compounds Vol. 1040; p. 183661 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
23.09.2025
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Subjects | |
Online Access | Get full text |
ISSN | 0925-8388 |
DOI | 10.1016/j.jallcom.2025.183661 |
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Summary: | Because of the distinct electronic structure and modifiable luminescence properties, the trivalent chromium ion (Cr3 +) has emerged as the main subject of near-infrared phosphor research. In this study, the Sr8ZnSc(PO4)7:Cr3+ near-infrared emitting phosphor was successfully synthesized via the high-temperature solid-phase method. Its crystal structure, luminescence properties, thermal stability, low-temperature sensing and potential application in light-emitting diodes (LEDs) were investigated in detail. Density functional theory proves that Cr has a heterovalent substitution for Sr. The abundant Sr sites enable the spectrum to have a wide emission range. Its central peak position is at 914 nm, and the coverage range is 700 – 1400 nm. At 373 and 423 K, the luminescence intensity retains 90.61 % and 76.88 % of ambient temperature, respectively, demonstrating its ideal thermal stability. Additionally, a dual-mode measurement method was adopted to study its temperature sensitivity at low temperatures. The results show that Sr8ZnSc(PO4)7:Cr3+ has excellent sensitivity at low temperature. Lastly, a near-infrared pc-LED device was successfully fabricated and its related applications in the fields of night vision and perspective were demonstrated. This work provides new ideas for the preparation of near-infrared phosphors by the heterometric substitution strategy. And the prepared phosphors have potential applications in low temperature sensing and pc-LED.
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•Density functional theory proves that Cr has a heterovalent substitution for Sr.•The heterovalent substitution enhances the anti-thermal quenching of the phosphor.•The prepared phosphors have potential application values in the fields of low-temperature sensing, near-infrared pc-LED devices, night vision and perspectivey. |
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ISSN: | 0925-8388 |
DOI: | 10.1016/j.jallcom.2025.183661 |