Kundu, SoumyaO’Connell, JerichoHart, AlexanderRichtsmeier, DevonBazalova-Carter, MagdalenaSaidaminov, Makhsud I.2025-01-232025-01-232022Kundu, S., O’Connell, J., Hart, A., Richtsmeier, D., Bazalova-Carter, M., & Saidaminov, M. I. (2022). Halide perovskites for direct conversion megavoltage x-ray detectors. Advanced Electronic Materials, 8(12). https://doi.org/10.1002/aelm.202200640https://doi.org/10.1002/aelm.202200640https://hdl.handle.net/1828/20988Megavoltage (MV) X-ray detectors used in cancer treatment either suffer from low sensitivity (scintillators) or prohibitively high cost (direct conversion). Here solution-processed direct-conversion MV X-ray detectors are demonstrated based on halide perovskites. The authors’ prototype devices show a sensitivity of ≈0.7 µC Gyair-¹ cm-², high photon-to-carrier conversion efficiency of 42 500%, and a signal-to-noise ratio of ≈1750 to 6 MV X-ray beam of a medical linear accelerator. The detector shows a contrast of over -1.5% per cm of solid water, comparable to state-of-art commercial gadolinium oxysulfide (GOS) MV X-ray scintillators. This work demonstrates the first prototype of low-cost and efficient direct-conversion MV X-ray detectors.enAttribution 4.0 InternationalArticleDepartment of ChemistryDepartment of Physics and Astronomy