Abstract
The current study uses the nebulized spray pyrolysis (NSP) approach to study the effect on crystalline, morphological, electrical conductivity, and photo detector properties of Bi2S3 thin films through Fe doping produced on amorphous glass substrates. The orthorhombic structure of Bi2S3 thin films for the pristine and Fe doped Bi2S3 thin films was confirmed by X-ray diffraction studies. The XRD data of the samples were used to calculate crystallite size value and maximum crystallite size value of 38 nm was observed for 2% Fe-doped Bi2S3 film. FESEM image of 2% Fe-doped film shows the distribution of uniform grains. With the increase in concentration of the Fe dopants from 0% to 5%, the energy gap value changes from 2.2 to 2.47 eV. The 2% Fe-doped Bi2S3 film possesses highest responsivity (9.60 × 10-2 AW-1), external quantum efficiency (22.4%), and detectivity (1.34 × 1010 Jones) properties suggests that the sample might be better suited for the application of the photo detectors.
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