High‐Entropy Glass Scintillators With Anti‐Crystallization Stability for High‐Resolution X‐Ray Imaging

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Abstract
Glass scintillators have become promising for high‐resolution x‐ray imaging owing to the low‐scattering light output, but the inherent tendency toward crystallization remains a critical challenge to maintain long‐term stability. To fundamentally tackle glass metastability, a high‐entropy design is utilized to disrupt the energetic preference for crystallization. A series of Mn‐based organic–inorganic hybrid metal halides (ATPP n ) 2 MnBr 4 (ATPP n = alkyltriphenylphosphonium, n = 2–6) are prepared to leverage configurational entropy for the construction of five‐component high‐entropy glass (HEG). The elevated entropy in HEG establishes a formidable kinetic barrier against crystallization, thereby overcoming rapid degradation to ensure exceptional stability for over 150 days. The current Mn‐based HEG scintillator exhibits bright luminescence and outstanding scintillation properties, including a low detection limit of 16.5 nGy s −1 and a spatial resolution of 28.3 lp mm −1 . This superior performance further allows for high‐resolution and dynamic x‐ray imaging to visualize real‐time detection of rotating targets. This work not only demonstrates a stable, high‐performance glass scintillator but also validates a general high‐entropy strategy to overcome the metastability of functional glasses.
Funding Information
  • National Natural Science Foundation of China (22475098)
  • National Natural Science Foundation of China (22271153)

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