10.1186/2228-5326-3-2

Band gap determination using absorption spectrum fitting procedure

  1. Physics Department, Faculty of Science, Malayer University, Malayer, IR
Cover Image

Published in Issue 2013-01-09

How to Cite

Ghobadi, N. (2013). Band gap determination using absorption spectrum fitting procedure. International Nano Letters, 3(1 (December 2013). https://doi.org/10.1186/2228-5326-3-2

HTML views: 125

PDF views: 166

Abstract

Abstract In this article, using the Tauc model, the absorption spectrum fitting method was applied to estimate the optical band gap and width of the band tail of the CdSe nanostructural films that requires only the measurement of the absorbance spectrum, and no additional information such as the film thickness or reflectance spectra is needed. Samples are prepared by chemical bath deposition method. Fabricated nanostructural thin films are thick but are composed from nanoparticles.

Keywords

  • Absorption spectrum fitting,
  • Thin film,
  • Nanostructured material,
  • Chemical synthesis

References

  1. Brus (1991) Quantum crystallites and nonlinear optics https://doi.org/10.1007/BF00331535
  2. Millo et al. (2001) Imaging and spectroscopy of artificial-atom states in core/shell nanocrystal quantum dots https://doi.org/10.1103/PhysRevLett.86.5751
  3. Wang and Herron (1991) Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties https://doi.org/10.1021/j100155a009
  4. Kale et al. (2004) Growth and characterization of nanocrystalline CdSe thin films deposited by the successive ionic layer adsorption and reaction method https://doi.org/10.1088/0268-1242/19/8/006
  5. Inokuma et al. (1990) Size effects on the temporal dynamics of edge emission in CdSe microcrystals embedded in a germanate glass matrix M https://doi.org/10.1103/PhysRevB.42.11093
  6. Greenwood and Earnshaw (1990) Pergamon
  7. Bawendi et al. (1992) Luminescence properties of cadmium selenide quantum crystallites: resonance between interior and surface localized states https://doi.org/10.1063/1.462114
  8. Alivisatos (1996) Semiconductor clusters, nanocrystals, and quantum dots https://doi.org/10.1126/science.271.5251.933
  9. Brus (1983) A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites https://doi.org/10.1063/1.445676
  10. Brus (1984) Electron–electron and electron‐hole interactions in small semiconductor crystallites: the size dependence of the lowest excited electronic state https://doi.org/10.1063/1.447218
  11. Brus (1986) Electronic wave functions in semiconductor clusters: experiment and theory https://doi.org/10.1021/j100403a003
  12. Souri and Shomalian (2009) Band gap determination by absorption spectrum fitting method (ASF) and structural properties of different compositions of (60 − x) V2O5–40TeO2–xSb2O3 glasses (pp. 1597-1601) https://doi.org/10.1016/j.jnoncrysol.2009.06.003
  13. Alarcon et al. (2007) Comparison and semiconductor properties of nitrogen doped carbon thin films grown by different techniques https://doi.org/10.1016/j.apsusc.2007.07.052
  14. Mane and Lokhande (2000) Chemical deposition method for metal chalcogenide thin films (pp. 1-31) https://doi.org/10.1016/S0254-0584(00)00217-0
  15. Kale and Lokhande (2005) Band gap shift, structural characterization and phase transformation of CdSe thin films from nanocrystalline cubic to nanorod hexagonal on air annealing (pp. p1-p9) https://doi.org/10.1088/0268-1242/20/1/001
  16. Mott and Davis (1979) Clarendon
  17. Tauc and Menth (1972) States in the gap (pp. 8-10)
  18. Chopra et al. (1990) Electrical, optical and structural properties of amorphous V2O5 TeO2 blown films