Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Effect of back electrode on trap energy and interfacial barrier height of crystal violet dye-based organic device

  • 33 Accesses

Abstract

In this work, we have studied the effect of aluminium-coated mylar (Al–M) sheet-based back electrode and aluminium (Al)-coated back electrode on trap energy (\(E_{\mathrm {t}})\) and barrier height (\(\phi _{\mathrm {b}})\) of crystal violet (CV) dye-based organic device. Two devices have been prepared using two different back electrodes. In both the devices, ITO-coated glass is used as front electrode. Both the organic devices have been prepared by using spin-coating techniques. We have measured the steady state current–voltage (IV) characteristics of these devices to estimate the trap energy (\(E_{\mathrm {t}})\) and barrier height (\(\phi _{\mathrm {b}})\) of the devices. Because of the insertion of a reflecting back electrode, the charge carriers are confined in the active layer, which reduces the \(E_{\mathrm {t}}\) from 0.044 to 0.034 eV and \(\phi _{\mathrm {b}}\) is reduced from 0.80 to 0.77 eV. The barrier height is also estimated by using another alternative method, which is known as Norde method. By using Norde method, \(\phi _{\mathrm {b}}\) is estimated, which reduces from 0.83 to 0.79 eV in the presence of reflecting back electrode. Both the methods show good consistency with each other. The reductions of these parameters indicate the enhancement of charge injection through the metal-organic dye interface. With the use of polished back electrode in the CV dye-based organic device, it is possible to modify the barrier height and trap energy and thereby modifies the conductivity.

This is a preview of subscription content, log in to check access.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

References

  1. 1.

    Kim J J, Han M K and Noh Y Y 2011 Semicond. Sci. Technol26 3

  2. 2.

    Tessler N, Preezant Y, Rappaport N and Roichman Y 2009 Adv. Mater21 27

  3. 3.

    Kumatani A, Li Y, Darmawan P, Minari T and Tsukagoshi K 2013 Nature 3 1026

  4. 4.

    Chakraborty S and Manik N B 2014 J. Semicond35 12

  5. 5.

    Tung R T 1992 Phys. Rev. B 45 13509

  6. 6.

    Mönch W 1999 J. Vac. Sci. Technol. B 17 1867

  7. 7.

    Lara Bullejos P, Jiménez Tejada J A, Deen M J, Marinov O and Datars W R 2008 J. Appl. Phys. 103 06

  8. 8.

    De Dilip K and Olawole Olukunle C 2019 J. Phys. Commun3 01

  9. 9.

    Yildirim M 2017 J. Polytech. 20 165

  10. 10.

    Shuugrue Christopher R, Mentzen Hans H and Linton Brian R 2015 J. Chem. Educ. 92 1

  11. 11.

    Tuğluoğlu N and Karadeniz S 2012 Curr. Appl. Phys. 12 1529

  12. 12.

    Sze S M and Kwok K N G 2007 Phys. Semicond. Devices (New Jersey: Wiley) (3rd edn)

  13. 13.

    Chakraborty K, Chakraborty S and Manik N B 2018 J. Semicond. 39 094001

  14. 14.

    Shah M, Karimov S Kh, Ahmad Z and Sayyad H M 2010 Chin. Phys. Lett. 27 10

  15. 15.

    Yakuphanoglu F 2010 Synth. Met. 160 15

  16. 16.

    Aydın M E, Kılıçoğlu T, Akkılıç K and Hosgören H 2006 Physica B 381 1

  17. 17.

    Al-Ta’ii H, Amin Y and Periasamy V 2015 Sensors 15 4810

  18. 18.

    Shah M, Sayyad H M, Karimov S Kh and Wahab F 2010 J. Phys. D Appl. Phys. 43 5104

  19. 19.

    Harrabi Z, Jomni S, Beji L and Bouazizi A 2010 Physica B Condens. Matter 405 3745

  20. 20.

    Norde H 1979 J. Appl. Phys. 50 5052

  21. 21.

    Haldar A, Maity S and Manik N B 2008 Ionics 14 427

Download references

Acknowledgements

We sincerely acknowledge the University Grants Commission (UGC), for financial assistance and Sudipta Sen is thankful to UGC for awarding a research fellowship (Grant No. 3482/(NET-JULY2016)).

Author information

Correspondence to Sudipta Sen.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Sen, S., Manik, N.B. Effect of back electrode on trap energy and interfacial barrier height of crystal violet dye-based organic device. Bull Mater Sci 43, 60 (2020). https://doi.org/10.1007/s12034-020-2047-2

Download citation

Keywords

  • Barrier height
  • back electrode
  • crystal violet dye
  • trap energy