Utilization of 2D gahnite nanosheets as highly conductive, transparent and light trapping front contact for silicon solar cells

  • Gobinath Velu Kaliyannan
  • Senthil Velmurugan Palanisamy
  • Manivasakan Palanisamy
  • Moganapriya Chinnasamy
  • Sankaranarayanan Somasundaram
  • Nithyavathy Nagarajan
  • Rajasekar RathanasamyEmail author
Original Article


The current scenario illustrates distinct interest in developing renewable energy sources for power generation. In this regard, several researches are performed in enhancing the power conversion efficiency of solar cells. The present work focuses on utilizing ZnAl2O4 (gahnite) spinel as antireflection coating material to improve the power conversion efficiency of silicon solar cells. Gahnite was synthesized using two precursors namely zinc nitrate hexahydrate and aluminum nitrate nonahydrate through sol–gel technique. The thickness of the prepared gahnite sheets measured through atomic force microscopy was around 50 nm. Single to quintuple layers of gahnite was deposited on silicon solar substrate using spin coating technique. The influence of gahnite coating on the structural, optical, electrical properties and cell temperature of silicon solar cells are analyzed. The synthesized gahnite bears spinel crystal structure in the form of two dimensional nanosheet. Increment in layer thickness proves the deposition of single to quintuple layer on silicon substrate. A maximum of 93% transmittance and 20.72% power conversion efficiency at a low cell temperature (39.4 °C) has been achieved for triple layer deposition proving diffusion of more photons on the substrate. The obtained results prove gahnite as suitable anti-reflection coating material for enhancing the power conversion efficiency of silicon solar cells.


Silicon solar cell Sol–gel Anti-reflection coating Gahnite Power conversion efficiency 



This research work was supported by the Science and Engineering Research Board (SERB), Department of Science & Technology (DST), Government of India, under the Start Up Research Grant for Young Scientist (Project Grant No.YSS/2015/001151).


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  • Gobinath Velu Kaliyannan
    • 1
  • Senthil Velmurugan Palanisamy
    • 1
  • Manivasakan Palanisamy
    • 2
  • Moganapriya Chinnasamy
    • 1
  • Sankaranarayanan Somasundaram
    • 1
  • Nithyavathy Nagarajan
    • 1
  • Rajasekar Rathanasamy
    • 1
    Email author return OK on get
  1. 1.School of Building and Mechanical SciencesKongu Engineering CollegePerunduraiIndia
  2. 2.Department of ChemistryBharathiar University Arts and Science CollegeErodeIndia

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