Universal growth of perovskite thin monocrystals from high solute flux for sensitive self-driven X-ray detection.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38493199.
- Also identified by DOI 10.1038/s41467-024-46712-y and PMC identifier 10944467.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Metal-halide perovskite thin monocrystals featuring efficient carrier collection and transport capabilities are well suited for radiation detectors, yet their growth in a generic, well-controlled manner remains challenging. Here, we reveal that mass transfer is one major limiting factor during solution growth of perovskite thin monocrystals. A general approach is developed to overcome synthetic limitation by using a high solute flux system, in which mass diffusion coefficient is improved from 1.7×10<sup>-10</sup> to 5.4×10<sup>-10</sup> m<sup>2</sup> s<sup>-1</sup> by suppressing monomer aggregation. The generality of this approach is validated by the synthesis of 29 types of perovskite thin monocrystals at 40-90 °C with the growth velocity up to 27.2 μm min<sup>-1</sup>. The as-grown perovskite monocrystals deliver a high X-ray sensitivity of 1.74×10<sup>5</sup> µC Gy<sup>-1</sup> cm<sup>-2</sup> without applied bias. The findings regarding limited mass transfer and high-flux crystallization are crucial towards advancing the preparation and application of perovskite thin monocrystals.