Na-alloy tailored 3D/0D metal halide heterostructures enabling efficient charge transfer for color-integrated white scintillators

作者：Zhi Yang, Jiangtao Cui, Ying Sun, Jisong Yao, Shuang Yang, Jizhong Song · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-62195-x · 被引用次数：14 · 研究领域：Perovskite Materials and Applications、Luminescence Properties of Advanced Materials、Radiation Detection and Scintillator Technologies

Lead-free halide perovskites featuring broad emissions have attracted increasing interest as X-ray imaging scintillators. Currently, the radioluminescence spectrum is primarily tuned by dopants and crystal fields, thus exploring a heterostructure manner to extensively modulate emission intensity and linewidth presents an exciting opportunity. Herein, we synthesize 3D/0D Cs2NaLuCl6/Cs3LuCl6(Sb) heterostructures via a Na-alloying strategy to tailor the spectral feature of scintillators. We find that type I heterostructure can promote the emission of 0D Cs3LuCl6(Sb) through charge transfer mechanism, as corroborated by the combination of energy band alignment, ultrafast transient dynamics, microscopic photoluminescence and electrical conductivity. As a result, 3D/0D scintillator exhibits a 1.8-times higher radioluminescence intensity than 0D scintillator. Meanwhile, featuring a spectrum-flat white emission, 3D/0D scintillator provides a balanced RGB output enabling to extend the dynamic range in color-integrated X-ray imaging. These findings provide insights into constructing metal halide heterostructures with efficient charge transfer, and advance the design and application of lead-free perovskites and their derivatives. Yang et al. report 3D/0D Lu-based perovskite heterostructures via a Na alloying strategy to enable spectrum-flat white emission under X-ray excitation. With the assistance of a color-integrated X-ray imaging technique, the 3D/0D white scintillator shows the cap...