Applied Physics A

, 125:112 | Cite as

On the elastic properties of INGAN/GAN LED structures

  • O. AkpınarEmail author
  • A. K. Bilgili
  • M. K. Öztürk
  • S. Özçelik
  • E. Özbay


In this study, three InGaN/GaN light-emitting diode (LED) structures with five periods are investigated grown by metal organic chemical vapor deposition (MOCVD) technique. During growth of these three samples, active layer growth temperatures are adjusted as 650, 667 and 700 °C. These structures are grown on sapphire (Al2O3) wafer as InGaN/GaN multi-quantum wells (MQWs) between n-GaN and p-AlGaN + GaN contact layers. During growth, pressure and flux ratio of all sources are kept constant for all samples. Only temperature of InGaN active layer is changed. These structures are analyzed with high-resolution X-ray diffraction (HR-XRD) technique. Their surface morphologies are investigated with atomic force microscopy (AFM). Reciprocal space mapping (RSM) is made different from classical HR-XRD analyses. Using this method, mixed peaks belonging to InGaN, AlGaN and GaN layers are seen more clearly and their full width at half maximum (FWHM) values is determined with better accuracy. With FWHM gained from RSM and Williamson–Hall (W–H) method based on universal elastic coefficients of the material, particle size D (nm), uniform stress σ (GPa), strain ε and anisotropic energy density u (kJ m−3) parameters for the samples are calculated. The results are compared with literature. On the other hand, to have an idea about the accuracy of the results AFM images are examined. Parameters calculated showed differences but it is seen that the largest particle size is gained for GaN and the smallest is gained for AlGaN. For all parameters, it is seen that they increase for GaN layer and decrease for AlGaN layer with increasing temperature. For InGaN layer parameters, they showed both increasing and decreasing or decreasing and increasing behavior harmonically with an increase in temperature. Results showed that they are compatible with literature. Results gained from Scherrer and W–H are very near to each other.



This work was supported by the Presidency Strategy and Budget Directorate (Grants Number 2016K121220).


  1. 1.
    H. Markoc, Hand book of nitride semiconductors and devices (Wiley-VCH, 2008), pp 76–78Google Scholar
  2. 2.
    Y. Bas, PhD thesis (University of Gazi, Turkey) (2015)Google Scholar
  3. 3.
    D. Kapolnek et al., App. Phys. Lett. 67, 11 (1995)CrossRefGoogle Scholar
  4. 4.
    F.A. Ponce, B.S. Krusor, J.S. Major, W.E. Plano, D.F. Welch, Appl. Phys. Lett. 67, 3 (1995)CrossRefGoogle Scholar
  5. 5.
    S. Chichibu, T. Azuhata, T. Sota, S. Nakamura, Appl. Phys. Lett. 69, 27 (1996)CrossRefGoogle Scholar
  6. 6.
    S.D. Lester, F.A. Ponce, M.G. Craford, D.A. Steigerwald, Appl. Phys. Lett. 66, 10 (1995)CrossRefGoogle Scholar
  7. 7.
    M. Schuster et al., J. Phys. D App. Phys. 32, 10a (1999)CrossRefGoogle Scholar
  8. 8.
    S. Çörekçi et al., J. Mater. Sci. 46, 1606–1612 (2011)ADSCrossRefGoogle Scholar
  9. 9.
    P. Tasli et al., Cryst. Res. Technol. 45, 2 (2010)ADSCrossRefGoogle Scholar
  10. 10.
    D.D. Koleske et al. Solid State Lighting and Solar Energy Technologies. (Society of Photo Optical, 2008), pp 17–40Google Scholar
  11. 11.
    M.K. Ozturk et al., J. Mater. Sci. Mater. Electron. 21, 2 (2010)CrossRefGoogle Scholar
  12. 12.
    M.K. Ozturk et al., Strain 47 (2011)Google Scholar
  13. 13.
    C. Kisielowski, Semi. Semi. 57 (1999)Google Scholar
  14. 14.
    M.A. Moram, M.E. Vickers, Rep. Prog. Phys. 72 3 (2009)Google Scholar
  15. 15.
    Y. Bas et al., J. Mater. Sci. Mater. Electron. 25, 9 (2014)CrossRefGoogle Scholar
  16. 16.
    M.K. Ozturk et al. Appl. Phys. A Mater. Sci. Proc. 114, 4 (2014)Google Scholar
  17. 17.
    G. Singla, K. Singh, O.P. Pandey, Appl. Phys. A Mater. Sci. Proc. 113, 1 (2013)CrossRefGoogle Scholar
  18. 18.
    A.K. Zak, W.H.A. Majid, M.E. Abrishami, R. Yousefi, Sol. State Sci. 13, 1 (2011)CrossRefGoogle Scholar
  19. 19.
    Y. Rosenberg et al., J. Phys. Con. Mat. 12, 37 (2000)Google Scholar
  20. 20.
    D. Balzar, H. Ledbetter, J. Appl. Crys. 26 (1993)Google Scholar
  21. 21.
    Z.F. Ma et al., J. Phys. D Appl. Phys. 41, 10 (2008)Google Scholar
  22. 22.
    M.K. Ozturk et al., Strain. 47, 19–27 (2011)CrossRefGoogle Scholar

Copyright information

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

Authors and Affiliations

  • O. Akpınar
    • 1
    • 2
    Email author
  • A. K. Bilgili
    • 1
  • M. K. Öztürk
    • 1
    • 2
  • S. Özçelik
    • 1
    • 2
  • E. Özbay
    • 3
  1. 1.Department of PhysicsGazi UniversityAnkaraTurkey
  2. 2.Photonics Research CenterGazi UniversityAnkaraTurkey
  3. 3.Nanotechnology Research CenterBilkent UniversityAnkaraTurkey

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