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Influence of pH on the physical properties of CdS thin film and its photosensor application

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Abstract

Synthesizing thin films on various substrates and serving as electrodes for photosensor is challenging task. In this work, influence of pH on structural and optical properties of cadmium sulfide (CdS) thin film investigated using a chemical bath deposition method on a glass substrate. The fabricated CdS film was characterized by using an X-ray diffraction pattern and field emission scanning electron microscopy (FE-SEM). From the structural analysis study, it shows that CdS thin film has a hexagonal phase structure. FE-SEM analysis study revealed uniform and homogenous deposition on the glass. Moreover, at pH = 10, the smallest crystal size obtained ~3 nm. From optical properties, analysis shows that CdS has a 3.12 eV–3.13 eV bandgap. The electrical parameters for films show substantial growth in current after light illumination. Also, the photosensitivity found that their sensitivity to light increases with reduction in the pH value.

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Acknowledgements

The authors are highly thankful and would like to acknowledge the Department of Physics, Dr. Babasaheb Ambedkar Marathwada University Aurangabad for providing necessary laboratory facilities. The authors also like to acknowledge the UGC SAP and DST FIST program for providing financial support to our laboratory.

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Authors and Affiliations

  1. Thin Film and Nanotechnology Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, Maharashtra, 431004, India

    Ibrahim M. S. Mohammed, Ghamdan M. M. Gubari, Makrand E. Sonawane, Vishnu V. Kutwade & Ramphal Sharma

  2. Department of Physics, College of Education Yafea, University of Aden, Aden, Yemen

    Ibrahim M. S. Mohammed

  3. Department of Electronics, G. T. Patil College, Nandurbar, MH, 425412, India

    R. R. Kasar

  4. Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul, 05006, Republic of Korea

    Supriya A. Patil

  5. Department of Physics, Dayanand Anglo-Vedic (PG) College, Kanpur, India

    Manoj K. Mishra

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  1. Ibrahim M. S. Mohammed
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  2. Ghamdan M. M. Gubari
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Correspondence to Ramphal Sharma.

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Mohammed, I.M.S., Gubari, G.M.M., Sonawane, M.E. et al. Influence of pH on the physical properties of CdS thin film and its photosensor application. Appl. Phys. A 127, 597 (2021). https://doi.org/10.1007/s00339-021-04743-y

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