High-Efficiency Luminescence of Mn<sup>2+</sup>-Doped Two-Dimensional Hybrid Metal Halides and X-Ray Detection
Mn<sup>2+</sup> doping in metal halide perovskites enables host-to-dopant energy transfer, creating new emission pathways for optoelectronic applications. However, achieving high-efficiency luminescence in 2D systems remains challenging. We synthesized Mn<sup>2+</sup>-doped 2...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/15/10/713 |
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| Summary: | Mn<sup>2+</sup> doping in metal halide perovskites enables host-to-dopant energy transfer, creating new emission pathways for optoelectronic applications. However, achieving high-efficiency luminescence in 2D systems remains challenging. We synthesized Mn<sup>2+</sup>-doped 2D PEA<sub>2</sub>CdCl<sub>4</sub> via the hydrothermal method, characterizing its properties through PL spectroscopy, quantum yield measurements, and DFT calculations. Flexible films were fabricated using PDMS and PMMA matrices. The 15% Mn<sup>2+</sup>-doped crystal showed orange–red emission with 90.85% PLQY, attributed to efficient host-to-Mn<sup>2+</sup> energy transfer and <sup>4</sup>T<sub>1</sub>→<sup>6</sup>A<sub>1</sub> transition. Prototype LEDs exhibited stable emission, while PDMS films demonstrated flexibility and PMMA films showed excellent X-ray imaging capability. This work demonstrates Mn<sup>2+</sup> doping as an effective strategy to enhance luminescence in 2D perovskites, with potential applications in flexible optoelectronics and X-ray scintillators. |
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| ISSN: | 2079-4991 |