Ion migration in perovskite materials accelerates its decomposition—deteriorating device performance, causing baseline drift, and lowering imaging resolution. In particular, in X-ray detectors, the effect of ion migration is more obvious under the necessary high working bias. Here, we report an effective strategy to grow superior inch-sized, high-quality, zero-dimensional (0D)-structured, lead-free (CH₃NH₃)₃Bi₂I₉ perovskite single crystals. These crystals have significantly lower ion migration, reduced dark current, and better environmental stability compared with other perovskites, enabling us to fabricate a type of 0D-structured perovskite X-ray detector. The X-ray detector shows high sensitivity of 1,947 μC Gy_air⁻¹ cm⁻², low detection limit of 83 nGy_air s⁻¹, short response time of 23.3 ms, the lowest baseline drift of 5.0 × 10⁻¹⁰ nA cm⁻¹ s⁻¹ V⁻¹, and the best long-term stability among all perovskites reported. The combination of large crystal size and excellent X-ray response allows us to fabricate the first 0D-structured perovskite X-ray imaging system.

钙钛矿材料中的离子迁移会加速其分解，从而降低器件性能，导致基线漂移并降低成像分辨率。特别是在X射线探测器中，在必要的高工作偏压下，离子迁移的影响更加明显。在这里，我们报告了一种有效的策略，可以生长出优质的英制尺寸，高质量，零维（0D）结构，无铅（CH ₃ NH ₃）₃ Bi ₂ I ₉钙钛矿单晶。与其他钙钛矿相比，这些晶体具有更低的离子迁移，更低的暗电流和更好的环境稳定性，从而使我们能够制造出一种0D结构的钙钛矿X射线检测器。的1947μC戈瑞的X射线检测器显示出高的灵敏度_空气^-1厘米^-2，83 NGY低检测极限_空气小号^-1，23.3毫秒，5.0×10最低基线漂移短的响应时间^-10 nA的cm的^{- 1} s ^-1 V ^-1，是所有钙钛矿中最佳的长期稳定性。大晶体尺寸和出色的X射线响应相结合，使我们能够制造出第一个0D结构的钙钛矿X射线成像系统。