Halide perovskites for direct conversion megavoltage X-ray detectors
Date
2022
Authors
Kundu, Soumya
O’Connell, Jericho
Hart, Alexander
Richtsmeier, Devon
Bazalova-Carter, Magdalena
Saidaminov, Makhsud I.
Journal Title
Journal ISSN
Volume Title
Publisher
Advanced Electronic Materials
Abstract
Megavoltage (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.
Description
Keywords
Citation
Kundu, 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.202200640