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

Zhi Yang (), Jiangtao Cui, Ying Sun, Jisong Yao, Shuang Yang and Jizhong Song ()
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Zhi Yang: Zhengzhou University
Jiangtao Cui: Zhengzhou University
Ying Sun: Zhengzhou University
Jisong Yao: Zhengzhou University
Shuang Yang: East China University of Science and Technology
Jizhong Song: Zhengzhou University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract 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.

Date: 2025
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DOI: 10.1038/s41467-025-62195-x

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