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<p>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 (<sup>4</sup>T<sub>1</sub>(G) → <sup>6</sup>A<sub>1</sub>) of Mn<sup>2+</sup>. 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 (C<sub>22</sub>H<sub>22</sub>O<sub>2</sub>P)<sub>2</sub>MnBr<sub>4</sub> 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 (C<sub>22</sub>H<sub>22</sub>O<sub>2</sub>P)<sub>2</sub>MnBr<sub>4</sub> was fabricated, exhibiting bright white light emission and a wide color gamut of 113% NTSC. Furthermore, a scintillation screen based on (C<sub>22</sub>H<sub>22</sub>O<sub>2</sub>P)<sub>2</sub>MnBr<sub>4</sub> was fabricated and utilized to investigate the internal structures of various objects. The screen demonstrates a high relative light yield of 70546 photons MeV<sup>−1</sup>, a low detection limit of 33.8 nGy<sub>air</sub> s<sup>−1</sup>, and a spatial resolution of up to 12.36 lp mm<sup>−1</sup>. 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.</p>

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Facile ball-milling synthesis of highly efficient manganese halides toward white light-emitting display and X-ray imaging

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Haixing Meng,
  • Ying Li,
  • Minqi Zhu,
  • Yancheng Chen,
  • Guozhen Shen

摘要

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.