Effect of exciton-spin-orbit-photon interaction in the performance of organic solar cells

  • Monishka Rita Narayan
  • Jai Singh
Regular Article
Part of the following topical collections:
  1. Topical issue: Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials


Photon absorptions leading to singlet and triplet excitonic states in organic solar cells are presented in this study. Applying Fermi’s golden rule, the rates of absorption of singlet and triplet excitons are derived using singlet exciton-photon and triplet exciton-spin-orbit-photon-interaction, respectively, as perturbation operators. The rate of triplet absorption depends on the square of the atomic number and hence heavier atoms play the dominant role. Incorporation of heavy metal atoms in the donor organic material enhances the absorption rate and hence absorption, leading of higher generation of excited charge carriers. This increases the conversion efficiency of organic solar cells. The results are compared with experimental studies.


Topical issue: Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials. Guest editors: Maria Antonietta Loi, Jasper Knoester and Paul H. M. van Loosdrecht 


  1. 1.
    M. Muntwiler, Q. Yang, W.A. Tisdale, X.Y. Zhu, Phys. Rev. Lett. 101, 19 (2008)CrossRefGoogle Scholar
  2. 2.
    M. Narayan, J. Singh, Phys. Status Solidi C 9, 12 (2012)CrossRefGoogle Scholar
  3. 3.
    C.M. Yang, C.H. Wu, H.H. Liao, K.Y. Lai, H.P. Cheng, S.F. Horng, H.F. Meng, J.T. Shy, Appl. Phys. Lett. 90, 13 (2007)Google Scholar
  4. 4.
    Z. Xu, B. Hu, J. Howe, J. Appl. Phys. 103, 4 (2008)Google Scholar
  5. 5.
    G.L. Schulz, S. Holdcroft, Chem. Mater. 20, 16 (2008)CrossRefGoogle Scholar
  6. 6.
    S. Lamansky, P. Djurovich, D. Murphy, F. Abdel-Razzaq, H.-E. Lee, C. Adachi, P.E. Burrows, S.R. Forrest, M.E. Thompson, J. Am. Chem. Soc. 123, 18 (2001)CrossRefGoogle Scholar
  7. 7.
    T. Tsuzuki, S. Tokito, Adv. Mater. 19, 2 (2007)CrossRefGoogle Scholar
  8. 8.
    J. Singh, Phys. Rev. B 76, 8 (2007)Google Scholar
  9. 9.
    J. Singh, I.K. Oh, J. Appl. Phys. 97, 6 (2005)Google Scholar
  10. 10.
    J. Singh, H. Baessler, S. Kugler, J. Chem. Phys. 129, 4 (2008)Google Scholar
  11. 11.
    J. Singh, Phys. Status Solidi A 208, 8 (2011)CrossRefGoogle Scholar
  12. 12.
    V.A. Dediu, L.E. Hueso, I. Bergenti, C. Taliani, Nat. Mater. 8, 9 (2009)CrossRefGoogle Scholar
  13. 13.
    A. Shafiee, M.M. Salleh, M. Yahaya, Sains Malaysiana 40, 2 (2011)Google Scholar
  14. 14.
    Y. Li, Y. Cao, J. Gao, D. Wang, G. Yu, A.J. Heeger, Synth. Met. 99, 3 (1999)CrossRefGoogle Scholar
  15. 15.
    P.G. Da Costa, E. Conwell, Phys. Rev. B 48, 3 (1993)Google Scholar

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Centre for Renewable Energy and Low Emissions Technology, Research Institute of the Environment and LivelihoodsCharles Darwin UniversityDarwinAustralia
  2. 2.School of Engineering and ITCharles Darwin UniversityDarwinAustralia

Personalised recommendations