Date: August 11, 2022
Congratulation’s to Emma and her co-authors on publishing their paper titiled
“Comparative Analysis of Multilayer Lead Oxide-Based X-ray Detector Prototypes”. This was
published in a Sensors Special Issue Advanced Materials and Technologies for Radiation
Detectors.
Abstract
Lead oxide (PbO) photoconductors are proposed as X-ray-to-charge transducers for the next
generation of direct conversion digital X-ray detectors. Optimized PbO-based detectors have
potential for utilization in high-energy and dynamic applications of medical X-ray imaging. Two
polymorphs of PbO have been considered so far for imaging applications: polycrystalline lead
oxide (poly-PbO) and amorphous lead oxide (a-PbO). Here, we provide the comparative analysis
of two PbO-based single-pixel X-ray detector prototypes: one prototype employs only a layer of
a-PbO as the photoconductor while the other has a combination of a-PbO and poly-PbO, forming
a photoconductive bilayer structure of the same overall thickness as in the first prototype. We
characterize the performance of these prototypes in terms of electron–hole creation energy (W±)
and signal lag—major properties that define a material’s suitability for low-dose real-time
imaging. The results demonstrate that both X-ray photoconductive structures have an adequate
temporal response suitable for real-time X-ray imaging, combined with high intrinsic sensitivity.
These results are discussed in the context of structural and morphological properties of PbO to
better understand the preparation–fabrication–property relationships of this material.
Continue reading the article: https://doi.org/10.3390/s22165998
