Low-dimensional perovskite materials and their derivatives with excellent optical performance are promising candidates for light-emission applications. Herein, centimeter lead-halide Cs₄PbBr₆ single crystals (SCs), which have been used for radiation detection with the indirect conversion method, were synthesized by a facile solution process. The Cs₄PbBr₆ scintillator exhibits bright green emission peaking at 525 nm and a high photoluminescence quantum yield (up to 86.7%) under 375 nm laser excitation. The Cs₄PbBr₆ SCs exhibit high sensitivity to 40 keV X-rays, with a favorable linearity with the X-ray exposure dose rate, and the detection limit is as low as 64.4 nGy_air/s. The scintillation time-response performance of the Cs₄PbBr₆ SCs was acquired by a time-correlated single-photon counting system under alpha-particle excitation. The Cs₄PbBr₆ SCs exhibit a very fast time response (τ_av = 1.46 ns) to alpha particles from a ²⁴¹Am radiation source. This value is comparable to that of the commercial plastic scintillator EJ-228 (τ_av = 1.31 ns) and much faster than that of the LYSO(Ce) scintillator (τ_av = 36.17 ns). Conceptual X-ray imaging and alpha-particle pulse height spectroscopy experiments were also performed. These results demonstrated the potential of Cs₄PbBr₆ SCs for radiation detection applications, including X-ray imaging and charged particle detection with fast scintillation decay time and high sensitivity.

低维钙钛矿材料及其具有出色光学性能的衍生物是发光应用的有前途的候选材料。在此，通过简便的溶液法合成了用于通过间接转换法进行放射线检测的厘米数的卤化铅Cs ₄ PbBr ₆单晶（SCs）。在375 nm激光激发下，Cs ₄ PbBr ₆闪烁体在525 nm处显示出明亮的绿色发射峰，并具有很高的光致发光量子产率（高达86.7％）。Cs ₄ PbBr ₆ SC对40 keV X射线表现出高灵敏度，并且与X射线照射剂量率呈良好的线性关系，并且检测限低至64.4 nGy_空气/ s。通过时间相关的单光子计数系统在α粒子激发下获得了Cs ₄ PbBr ₆ SC的闪烁时间响应性能。在Cs ₄ PbBr ₆的SC表现出非常快的响应时间（τ _AV  = 1.46纳秒）从α粒子²⁴¹上午辐射源。此值是比得上商业塑料闪烁体EJ-228（τ _AV  = 1.31纳秒）和比LYSO（Ce）的闪烁体的快得多（τ _AV  = 36.17纳秒）。还进行了概念性X射线成像和α粒子脉冲高度光谱实验。这些结果证明了Cs的潜力用于辐射检测应用的₄ PbBr ₆ SC，包括X射线成像和带电粒子检测，具有快速闪烁衰减时间和高灵敏度。