Graphene-nanoparticle incorporated responsivity tuning of p-CuO/n-Si-based heterojunction photodetectors

  • Jenifar Sultana
  • Anannya Bhattacharya
  • Anupam Karmakar
  • Goutam K Dalapati
  • Sanatan ChattopadhyayEmail author


The current work focusses on investigating the appropriate wt% of graphene-nanoparticles to be incorporated into the CuO film as a dopant for enhancing its optoelectronic properties. CuO and graphene-nanoparticle-incorporated CuO films (CG) are grown by employing a chemical bath deposition (CBD) method. Graphene-nanoparticles have been incorporated at different wt% (1, 5 and 10%) with respect to the metal salt (\(\hbox {CuCl}_{{2}}{\cdot }\hbox {2H}_{{2}}\hbox {O}\)), and a comparative study has been performed on the systematic change of the film morphology, chemical composition, oxidation states, crystallite structures and photo-sensing effects. It has been found that the morphology and the structural properties of CBD grown CuO films have been tuned by the incorporation of graphene-nanoparticles. The results show a significant enhancement in the optoelectronic properties of CG1 (1%) and CG5 (5%) films. The optical properties of the as-grown films have been observed to be modified by graphene-nanoparticle incorporation. Moreover, the electronic and optoelectronic characteristics of the fabricated p-CuO/n-Si heterojunctions have also been investigated. The enhancement of the optoelectronic properties of the CG5 sample as compared to other grown films in the present study suggests that the responsivity and photodetecting properties of the CBD grown CuO films can be improved by graphene-nanoparticle incorporation.


Graphene-nanoparticle CuO CBD responsivity photodetector 



Miss Jenifar Sultana likes to acknowledge the Department of Science and Technology (DST), India, for providing inspire fellowship to pursue her research. We would also like to acknowledge the DST Purse program and Center of Excellence (COE), TEQIP, for providing infrastructure and financial support to conduct this work.


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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  • Jenifar Sultana
    • 1
  • Anannya Bhattacharya
    • 2
  • Anupam Karmakar
    • 2
  • Goutam K Dalapati
    • 3
  • Sanatan Chattopadhyay
    • 2
    Email author
  1. 1.Centre for Research in Nanoscience and Nanotechnology (CRNN)KolkataIndia
  2. 2.Department of Electronic ScienceUniversity of CalcuttaKolkataIndia
  3. 3.Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research)SingaporeSingapore

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