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Facile ball-milling synthesis of highly efficient manganese halides toward white light-emitting display and X-ray imaging
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DOI：10.1007/s40843-025-3886-1.png)
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Abstract
En 中文
Organic-inorganic hybrid Mn(II) halides have garnered considerable attention for various optoelectronic applications due to their environmental friendliness and high photoluminescence quantum yield (PLQY), which stems from the d-d characteristic transition (4T1(G) → 6A1) of Mn2+. However, the complex synthesis process restricts this material’s potential for low-cost, large-scale production, thereby impeding its further development. In this study, the Mn(II) halide (C22H22O2P)2MnBr4 was synthesized via a simple and efficient mechanochemical ball-milling approach, achieving high photoluminescence efficiency and production yield. The halide exhibits intense green emission centered at 520 nm with a PLQY of up to 96.1%. Combined experimental and theoretical characterizations confirm that the strong light emission originates from the synergistic interaction between organic cations and inorganic framework components. Accordingly, a white light-emitting diode (WLED) device based on (C22H22O2P)2MnBr4 was fabricated, exhibiting bright white light emission and a wide color gamut of 113% NTSC. Furthermore, a scintillation screen based on (C22H22O2P)2MnBr4 was fabricated and utilized to investigate the internal structures of various objects. The screen demonstrates a high relative light yield of 70546 photons MeV−1, a low detection limit of 33.8 nGyair s−1, and a spatial resolution of up to 12.36 lp mm−1. Finally, by integrating the scintillation screen with a thin-film transistor (TFT) backplane, the resulting X-ray detector successfully enables simulated medical imaging of dental caries. This work not only establishes a robust foundation for the large-scale synthesis of highly efficient luminescent Mn(II) halides but also highlights their potential in multifunctional light-emitting applications.
Keywords:
Mn(II) halide
ball-milling method
high efficiency
X-ray imaging
TFT imaging
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