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Investigating the impact of thermal annealing on the photovoltaic performance of chemical bath deposited SnO2/p-Si heterojunction solar cells

  • Anannya Bhattacharya
  • Jenifar Sultana
  • Subhrajit Sikdar
  • Rajib Saha
  • Sanatan ChattopadhyayEmail author
Technical Paper
  • 26 Downloads

Abstract

The current work investigates the impact of annealing temperature on the optoelectronic properties of SnO2 thin films grown by chemical bath deposition (CBD) method. The as-grown SnO2 films, on p-Si substrate, are annealed at 200 °C and 400 °C for 10 min in Ar ambient for investigating the impact of such annealing on the performance of SnO2/p-Si heterojunction solar cells. The growth of a uniform SnO2 film on Si surface has been confirmed from SEM studies and the chemical composition and optical properties of the as-grown and annealed films are investigated in detail by employing XRD and ellipsometric measurements. Absorption coefficient of the samples is observed to vary in the range of 24 × 105 – 60 × 105/m, at its band gap (3.0 eV). The current–voltage characteristics under both dark and illuminated conditions suggest superior voltaic performance of the 200 °C annealed SnO2 film. The short-circuit current density, open-circuit voltage and fill-factor are obtained to be 0.45 mA/cm2, 5.41 mA/cm2 and 0.4 V, 0.34 V and 13%, 8% respectively for as-grown and 200 °C annealed samples. The maximum power conservation efficiency (η) of 4.9% is obtained for the 200 °C annealed sample. Thus, the study indicates the potential of CBD-grown SnO2 film for photovoltaic applications.

Notes

Acknowledgements

Miss. Anannya Bhattacharya and Jenifar Sultana would like to acknowledge the DST inspire program India, for providing financial support to pursue their research. Subhrajit Sikdar and Rajib Saha would like to thank the University Grants Commission and WBDITE for funding their fellowships. The authors would also like to acknowledge the DST Purse program and Center of Excellence (COE), TEQIP and WBDITE for providing infrastructure and financial support to conduct this work.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Anannya Bhattacharya
    • 1
  • Jenifar Sultana
    • 2
  • Subhrajit Sikdar
    • 1
  • Rajib Saha
    • 1
  • Sanatan Chattopadhyay
    • 1
    Email author
  1. 1.Department of Electronic ScienceUniversity of CalcuttaCalcuttaIndia
  2. 2.Centre for Research in Nanoscience and Nanotechnology (CRNN)University of CalcuttaCalcuttaIndia

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