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August 28, 2026Advanced Functional Materials

Heterophase Engineering of Mechanochemically‐Synthesised All‐Inorganic Ternary Copper Iodide for Tuneable White Light Emission

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Authors

JCJaeyoon ChoSeoul National UniversityYKYongjin KimSeoul National UniversityJKJae Il KimSeoul National University

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Implication

Experimental study reveals enhanced emission via 0D/1D heterophase interfaces in cesium copper iodides, suggesting scalable routes for tunable white-light optoelectronics.

Key Points

  • To elucidate the solid-state reaction pathways, structural evolution, and photophysical mechanisms governing 0D/1D heterophase formation in mechanochemically synthesized cesium copper iodide.
  • Utilized solvent-free mechanochemical synthesis (ball milling) with reaction quenching at predetermined milling intervals to achieve time-resolved structural analysis.
  • Correlated solid-state phase transitions with photophysical properties to trace interface formation between 0D Cs3Cu2I5 and 1D CsCu2I3 phases.
  • Identified a kinetically accessible solid-state pathway that forms a direct physical interface between 0D Cs3Cu2I5 and 1D CsCu2I3 heterophases.
  • Observed interfacial charge transfer and defect passivation at the heterophase boundary, which substantially enhanced emission from the weakly emissive 1D phase to yield balanced, tunable white light.

Cite This Study

Cho et al. (2026) studied this question.

synapsesocial.com/papers/6a914622d15324a1df3a976ahttps://doi.org/10.1002/adfm.77963
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