Organic Semiconductor Single Crystals for X‐ray Imaging

Abstract 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 −1 . 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.