Universal growth of perovskite thin monocrystals from high solute flux for sensitive self-driven X-ray detection
Da Liu, Yichu Zheng, Xin Sui, Xue Wu, Can Zou, Yu Peng, Xinyi Liu, Miaoyu Lin, Zhanpeng Wei, Hang Zhou, Ye‐Feng Yao, Sheng Dai, Haiyang Yuan, Hua Gui Yang, Shuang Yang, Yu Hou
Abstract
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 –10 to 5.4×10 –10 m 2 s –1 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 –1 . The as-grown perovskite monocrystals deliver a high X-ray sensitivity of 1.74×10 5 µC Gy −1 cm −2 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.