Na-alloy tailored 3D/0D metal halide heterostructures enabling efficient charge transfer for color-integrated white scintillators
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 inte...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-62195-x |
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| Summary: | 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. |
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| ISSN: | 2041-1723 |