Perovskite CsPbBr3 Single Crystal Detector for High Flux X-Ray Photon Counting

X-ray photon-counting detectors capable of resolving the energies of single X-ray photons are critical in medical imaging, and a high count rate is essential for photon-counting detectors. Here, we report the performance of the perovskite CsPbBr3 single-crystal semiconductor detector for X-ray photon counting. The CsPbBr3 detector noise floor, energy response linearity, energy resolution, count rate, and polarization were evaluated. By fine-tuning the detector working conditions, our CsPbBr3 detector with a planar electrode can count an incident X-ray photon rate of similar to 0.099 and similar to 0.336 Mcps/pixel at 10% and 30% deadtime loss, respectively, with corresponding energy resolutions of similar to 18% at 59.5 keV and similar to 12% at 122 keV at same pulse processing conditions. We also demonstrated that our CsPbBr3 detectors show negligible polarization under an X-ray flux of similar to 0.45 M photons/s/mm(2) for the typical timescale of multiple clinical X-ray scans, such as 1 s similar to 100 s. Our evaluation demonstrates the high potential of CsPbBr3 detectors for X-ray photon-counting applications in medical and industrial diagnostics with a lower cost than the current state-of-the-art.

Automated summary

This study reports the performance of CsPbBr3 single-crystal semiconductor detectors capable of resolving the energies of single X-ray photons. By fine-tuning the working conditions, the detector demonstrates a high count rate for X-ray photon counting and exhibits low polarization over a typical timescale of multiple clinical X-ray scans. This demonstrates the potential of CsPbBr3 detectors for X-ray photon-counting applications in medical and industrial diagnostics, with lower cost compared to current state-of-the-art detectors.