Multilayer borophene patched PEDOT:PSS p-n junctions for medical x-ray detection

Abstract In this study, we combine n-type PEDOT:PSS with multilayer borophene nanosheets (BNSs) at defined weight ratios. As borophene is a material that behaves like a p -type, we observe the formation of localized p-n junctions along the organic–inorganic hybrid structures, as evidenced by current–voltage ( I-V ) curves measured in the dark and their photoconductivity behavior under specific x-ray dose rates via a medical fluoroscopy x-ray system. For instance, in the wt1% BNSs-doped structure, negative photocurrents stand out with increasing dose rates, while in the wt 10% doped structure, positive photocurrents are observed in reverse and forward biases, which are typical characteristics of photodetectors. The behavior of the open circuit voltage in reverse bias for the wt 20% doped structure as a result of high doping is also discussed. We obtain the x-ray detector parameters for the structure exhibiting more dominant photodetector behavior and present them alongside comparable, though limited, studies. These findings underscore the noteworthy interactions of organic–inorganic hybrid materials and highlight the potential of borophene as a 2D material for medical x-ray detection.