The public discussion took place for the Doctoral student (Ahmed Mudhafar Ahmed Marouf) at Anbar University, College of Science, Department of Physics, on Saturday, September 6, 2025, in Ibn Sina Hall, for his tagged thesis

" Novel synthesis pathway of bismuth sulfide nanostructure by pulsed laser ablation in liquid for photovoltaic detectors"

The discussion committee consisted of:

The study aims a novel pathway to preparation of bismuth sulfide nanoparticles via laser ablation of bismuth in various solutions and to study the effect of laser parameters on the characteristics of Bi2S3/Si photodetector device.

The influence of various laser parameters was extensively studied through structural, morphological, chemical, optical and electrical characteristics. The current-voltage properties of the heterojunctions under both dark and light conditions have been studied. The prepared samples were used to prepare and characterize the Bi2S3/p-Si HJs as a function of various laser fluence.  After studying the properties of the effect of various laser fluence on the preparation of Bi2S3/p-Si NPs, a Bi2S3/p-Si HJs photodetector with various laser fluence was fabricated. The results also showed that the photocurrent is directly proportional to the intensity of the incident light, indicating the possibility of the junction functioning as an effective photodetector.

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