Structural and Electrical Properties of Low-Energy Ion Beam Kr-Irradiated In/Se Bilayer

Authors

  • Anil K. Das St. John’s College
  • Aloke Verma Kalinga University
  • Vikram Singh St. John’s College
  • Arun K. Diwakar Govt Model Residential Girls College
  • Manju Bala Hindu College
  • Devesh Kumar Avasthi ENERGY ACRES, UPES
  • K. Asokan UPES
  • S.K. Tripathi Panjab University
  • Prabhakar Singh St. John’s College
  • S.A. Khan Inter-University Accelerator Centre (IUAC),

DOI:

https://doi.org/10.37591/jopc.v11i1.7038

Abstract

In the present work, In (~50 nm) over Se (~50 nm) thin films were deposited successively on an Si substrate by e-beam evaporation method under 2×10–5 mbar pressure. The In/Se bilayers were irradiated with low-energy ion beams of 350 keV Kr+1 with fluence of 3 × 1016 ions/cm2. The sample was subsequently characterized for phase formation using X-ray diffraction and thickness profile using Rutherford backscattering spectrometry analysis. In the pristine sample, X-ray diffraction exhibited phase formation, confirming mixing. Rutherford backscattering spectrometry also confirmed mixing of the two layers in the pristine sample. It also confirms that Se from second layer is mixed to the third layer of Si (substrate layer). This mixing is increased greatly by Kr ion irradiation. According to scanning electron microscopy analysis, stone-like nanostructures of various sizes have formed in the pristine sample. The surface is smoothened by the Kr ion irradiation. In addition, temperature-dependent electrical measurements of the pristine sample were made. The pristine sample showed n type charge carriers as predicted by Hall measurement. The resistivity of the pristine sample exhibited semiconductor behaviour as the temperature rises. The Kr-irradiated sample has very high resistance of the order of megaohms. So, Hall coefficient, Seebeck, and resistivity measurements could not be carried out.

Author Biographies

  • Anil K. Das, St. John’s College
    Assistant Professor, Physics Department
  • Aloke Verma, Kalinga University
    Assistant Professor, Department of Physics
  • Vikram Singh, St. John’s College
    Assistant Professor, Physics Department
  • Arun K. Diwakar, Govt Model Residential Girls College
    Assistant Professor
  • Manju Bala, Hindu College
    Physics Department, Assistant Professor (Ad hoc)
  • Devesh Kumar Avasthi, ENERGY ACRES, UPES
    Professor Emeritus and Dean Research & Development
  • K. Asokan, UPES
    Professor Emeritus, ENERGY ACRES
  • S.K. Tripathi, Panjab University
    Professor, Department of Physics
  • Prabhakar Singh, St. John’s College
    Professor (Retd.), Physics Department,
  • S.A. Khan, Inter-University Accelerator Centre (IUAC),
    Scientist F

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Published

2023-01-28

Issue

Vol. 11 No. 1 (2023)

Section

Research Articles

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