Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Sciences, Tianjin University, Tianjin, 300072, China.
MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou, 350207, China.
Adv Mater. 2021 Oct;33(43):e2104749. doi: 10.1002/adma.202104749. Epub 2021 Sep 20.
Low-dose, high-resolution X-ray imaging is vital for medical diagnostics and material/device analyses. Current X-ray imagers are dominated by expensive inorganic materials via high-temperature solid processes (up to 1700 °C, e.g., CsI:Tl) with heavy metal elements. It is essential to search for new materials as X-ray imagers with low growth temperature, low cost, high sensitivity, along with high chemical and environmental stability. Here, 9,10-diphenylanthracene (9,10-DPA) single crystals are used as a representative model, which are grown via low-temperature solution processes, exhibiting intense X-ray radioluminescence with ultrahigh photon-conversion efficiency, ultrafast response and high sensitivity. The resolution of devices based on organic crystals exceeds 20.00 lp mm . Meanwhile the crystals exhibit high cycle performance under X-ray irradiation and environmental stability. This study demonstrates that organic semiconductors have potential use in low-cost, high-sensitivity and low-dose X-ray imaging systems.
低剂量、高分辨率 X 射线成像是医学诊断和材料/器件分析的关键。目前的 X 射线成像仪主要通过高温固相工艺（高达 1700°C，例如 CsI:Tl）使用重金属元素的昂贵无机材料制成。寻找新的材料至关重要，因为需要具有低温生长、低成本、高灵敏度以及高化学和环境稳定性的 X 射线成像仪。在这里，使用 9,10-二苯基蒽（9,10-DPA）单晶作为代表性模型，通过低温溶液工艺进行生长，表现出超强的 X 射线光致发光，具有超高的光子转换效率、超快的响应速度和高灵敏度。基于有机晶体的器件分辨率超过 20.00 lp mm 。同时，晶体在 X 射线辐照和环境稳定性下表现出高循环性能。本研究表明，有机半导体在低成本、高灵敏度和低剂量 X 射线成像系统中具有应用潜力。
