Analysis of photocurrent trends in hybrid PS-BiI3 composites for direct X-ray detector via linear regression model

This study is intended to propose a non-toxic, environmentally stable, BiI3-polystyrene composite with good X-ray induced photocurrent response which are used as source for medical diagnosis purpose. Composite of different weight ratios of BiI3 as conductive filler are developed for the study. The experimental results reveals that 50:50 wt % ratio of BiI3 filler in polymer matrix gives an improved linear photo-response showed acceptable filler percentage for the composite. Further, a linear regression model to predict the photocurrent trend in composite samples synthesized with varying weight % has been developed, taking into consideration factors like constituent ratios of BiI3-polymer, distance between the electrodes and bias voltage. The photocurrent trend showed a good agreement between experimental and computational values. The developed linear regression equation that displayed a linear photo-response trend and a good correlation of 0.93 has been further validated experimentally for two test samples with high correlation maintained. The model shows great prospects to be extended to other composite materials, with in depth consideration of additional parameters and associated non linearities, for efficient development of portable X-ray detection devices.

Automated summary

This study proposes a BiI3-polystyrene composite with good X-ray induced photocurrent response for medical diagnosis. The composite with a 50:50 wt % ratio of BiI3 filler shows an improved linear photo-response. A linear regression model is also developed to predict the photocurrent trend, taking into consideration factors such as constituent ratios, electrode distance, and bias voltage. The experimental validation shows a good correlation and the model has potential for developing portable X-ray detection devices.