Nanoparticulate CdS 2D array by chemical bath deposition: Characterization and optoelectronic study

• Published in: Materials chemistry and physics Vol. 226; pp. 26 - 33
• Main Authors: Waldiya, Manmohansingh, Narasimman, R., Bhagat, Dharini, Vankhade, Dhaval, Mukhopadhyay, Indrajit
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.03.2019; Elsevier BV
• Subjects: Cadmium sulfide; CdS; Chemical bath deposition; Deposition; High detectivity; Light; Morphology; Nanoparticles; Nanoparticluate; Nanostructure; Optical properties; Optoelectronics; Organic chemistry; Photometers; Raman; Thin films; Nanoparticluate; High detectivity; Raman; CdS; Chemical bath deposition
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2019.01.017

Nanostructured CdS thin film was successfully deposited on glass by chemical bath deposition (CBD) at 80 °C. The effect of deposition time on the morphology, composition, optical and optoelectronic properties of nanostructured CdS thin films has been studied. The CBD-grown CdS thin films showed random arrangement of interconnected nanoparticles in 2D morphology. Nanostructured CdS thin films exhibited metastable cubic phase having uniform, compact and defect-free structure with enhanced crystallinity. Tauc plot of CBD-grown nanostructured CdS thin film showed an optimum band gap of 2.30 eV and a resonant Raman peak at 302 cm−1. The transverse optics (TO) mode, multi-phonon scattering and high-order replicas of nanostructured CdS thin films were also observed. Metal-semiconductor-metal (MSM) based CdS Photodetector (PD) showed an excellent photodetectivity of 2.6 × 1013 Jones. Photoconductive performance such as photo-sensitivity (207%) and - responsivity (0.38 A/W @ 420 nm) under an illumination condition was obtained for application in visible-light photodetector. [Display omitted] •Nanoparticluate CdS film was grown on glass substrate via chemical bath deposition.•CdS thin films showed random arrangement of interconnected nanoparticles in 2D.•Nanoscale structures in CdS showed enhancement in the Raman signatures.•MSM based CdS photodetectors showed excellent photoconductive properties.•CdS based photodetector showed photodetectivity of the order of 1014 Jones.