X-ray detection is an important technology for medical diagnosis as well as industrial and security inspections. While today's commercial X-ray detectors are bulky, photodetectors based on organic semiconductors have attracted increasing attention owing to their low temperature processing capabilities, flexibility and low cost. Nonetheless, the low X-ray attenuation coefficient of organic semiconductors still hinders their practical application. Herein, a new organic-inorganic hybrid strategy is proposed to improve the X-ray sensitivity of organic photodetectors (OPDs). A solution-processed X-ray sensitive hybrid OPD is fabricated by embedding CsPbBr₃ quantum dots (QDs) into a P3HT:PC₆₁BM bulk heterojunction photodiode. The QDs, acting as embedded scintillators in the organic active layer, maintain a high radioluminescence. The proposed hybrid structure enables indirect X-ray detection in a comprehensive manner. These hybrid photodetectors exhibit suppressed dark current densities in the range of tens of picoamperes per square centimeters for different weight ratios of blended QDs. The best OPD achieves a sensitivity of 229.6 e nGy⁻¹ mm⁻² (3.67 μC Gy⁻¹ cm⁻²) and a dark current of 23.3 pA cm⁻² at a low operating voltage (−3 V) for 20–80 kV “soft” X-rays, thus representing great potential for the development of next generation low cost, portable, and highly sensitive X-ray detectors.

X射线检测是医疗诊断以及工业和安全检查的重要技术。虽然当今的商用 X 射线探测器体积庞大，但基于有机半导体的光电探测器因其低温处理能力、灵活性和低成本而引起了越来越多的关注。尽管如此，有机半导体的低X射线衰减系数仍然阻碍了它们的实际应用。在此，提出了一种新的有机-无机混合策略来提高有机光电探测器（OPD）的 X 射线灵敏度。通过将 CsPbBr ₃量子点 (QD) 嵌入 P3HT:PC ₆₁来制造溶液处理的 X 射线敏感混合 OPDBM 体异质结光电二极管。量子点作为有机活性层中的嵌入式闪烁体，保持高辐射发光。所提出的混合结构能够以全面的方式进行间接 X 射线检测。对于不同重量比的混合量子点，这些混合光电探测器表现出每平方厘米数十皮安范围内的抑制暗电流密度。最好的 OPD在 20–80 kV 的低工作电压 (-3 V) 下实现了 229.6 e nGy ^-1 mm ^-2 (3.67 μC Gy ^-1  cm ^-2 )的灵敏度和 23.3 pA cm ^-2的暗电流“软”X 射线，因此代表了开发下一代低成本、便携式和高灵敏度 X 射线探测器的巨大潜力。