Electronic structures of interfacial states formed at polymeric semiconductor heterojunctions

Nature Materials

Volumn 7, Issue 6, 2008, Pages 483-489

  Huang, Ya Shih ^a,b   Westenhoff, Sebastian ^a,c   Avilov, Igor ^b   Sreearunothai, Paiboon ^a,d   Hodgkiss, Justin M ^a   Deleener, Caroline ^b   Friend, Richard H ^a   Beljonne, David ^b  

^a UNIVERSITY OF CAMBRIDGE   (United Kingdom)

^b UNIVERSITY OF MONS   (Belgium)

^c UNIVERSITY OF GOTHENBURG   (Sweden)

^d BROOKHAVEN NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRIC EXCITATION; ELECTROLUMINESCENCE; ELECTRONIC STRUCTURE; LIGHT EMITTING DIODES; PHOTOVOLTAIC CELLS; SEMICONDUCTING POLYMERS;

INTERFACIAL STATES; PHOTOVOLTAIC DIODES; POLYMER ACCEPTOR SYSTEMS; POLYMER DONOR SYSTEMS;

HETEROJUNCTIONS;

EID: 44349095346     PISSN: 14761122     EISSN: 14764660     Source Type: Journal    
DOI: 10.1038/nmat2182     Document Type: Article

References (31)

1. Morteani, A. C. et al. Barrier-free electron-hole capture in polymer blend heterojunction light-emitting diodes. Adv. Mater. 15, 1708-1712 (2003).
2. Halls, J. J. M. et al. Efficient photodiodes from interpenetrating polymer networks. Nature 376, 498-500 (1995).
3. Arias, A. C. et al. Photovoltaic performance and morphology of polyfluarene blends: A combined microscopic and photovoltaic investigation. Macromolecules 34, 6005-6013 (2001).
4. Brabec, C. J., Sariciftci, N. S. & Hummelen, J. C. Plastic solar cells. Adv. Funct. Mater. 11, 15-26 (2001).
5. Halls, J. J. M. et al. Charge- and energy-transfer processes at polymer/polymer interfaces: A joint experimental and theoretical study. Phys. Rev. B 60, 5721-5727 (1999).
6. Cao, Y., Parker, I. D., Yu, G., Zhang, C. Sc Heeger, A J. Improved quantum effidency for electroluminescence in semiconducting polymers. Nature 397, 414-417 (1999).
7. Palilis, L. C. et al. High performance blue light-emitting diodes based on conjugated polymer blends. Synth. Met. 121, 1729-1730 (2001).
8. McNeill, C. R., Westenhoff, S., Groves, C., Friend, R. H. & Greenham, N. C. Influence of nanoscale phase separation on the charge generation dynamics and photovoltic performance of conjugated polymer blends: Balancing charge generation and separation. J. Phys. Chem. C111, 19153-19160 (2007).
9. Morteani, A. C., Sreearunothai, P., Herz, L. M., Friend, R. H. Sc Silva, C. Exdton regeneration at polymeric semiconductor heterojunctions. Phys. Rev. Lett. 92, 247402 (2004).
10. Morteani, A. C., Friend, R. H. Sc Silva, C. Endothermic exdplex-exdton energy-transfer in a blue-emitting polymeric heterojunction system. Chem. Phys. Lett. 391, 81-84 (2004).
11. Sreearunothai, P. et al. Influence of copolymer interface orientation on the optical emission of polymeric semiconductor heterojunctions. Phys. Rev. Lett. 96, 117403 (2006).
12. Bittner, E. R., Ramon, J. G. S. & Karabunarliev, S. Exdton dissociation dynamics in model donor-acceptor polymer heterojunctions. I. Energetics and spectra. J. Chem. Phys. 122, 214719 (2005).
13. Ramon, J. G. S. & Bittner, E. R. Exdted state calculations on fluorene-based polymer blends: Effect of stacking orientation and solvation. J. Chem. Phys. 126, 181101 (2007).
14. Jenekhe, S.A. & Osaheni, J. A. Excimers and exciplexes of conjugated polymers. Science 265, 765-768 (1994).
15. Granlund, T., Pettersson, L. A. A., Anderson, M. R. & Inganas, O. Interference phenomenon determines the color in an organic light emitting diode. J. Appl. Phys. 81, 8097-8104 (1997).
16. Gebler, D. D., Wang, Y. Z., Fu, D.-K., Swager, T. M. & Epstein, A. J. Exdplex emission from bilayers of poly(vinyl carbazole) and pyridine based conjugated copolymers. J. Chem. Phys. 108, 7842-7848 (1998).
17. Offermans, T., van Hal, P. A., Meskers, S. C. J., Koetse, M. M. & Janssen, R. A. J. Exciplex dynamics in a blend of π-conjugated polymers with electron donating and acceptingproperties: MDMO-PPV and PCNEPV Phys. Rev. B 72, 045213 (2005).
18. Weller, A The Exciplex 23-38 (Academic, New York, 1975).
19. Xia, Y. & Friend, R. H. Controlled phase separation of polyfluorene blends via inkjet printing. Macromolecules 38, 6466-6471 (2005).
20. Gould, I. R., Young, R. H., Mueller, L. J., Albrecht, A. C. & Farid, S. Electronic structure of exciplexes and excited charge-transfer complexes. J. Am. Chem. Soc. 116, 8188-8199 (1994).
21. Valeur, B. Molecular Fluorescence Ch. 5 (Wiley-VCH Verlag GmbH, Weinheim, 2002).
22. Mihailetchi, V. D., Koster, L. J. A., Hummelen, J. C. & Blom, P. W. M. Photocurrent generation in polymer-fullerene bulk heterojunctions. Phys. Rev. Lett. 93, 216601 (2004).
23. Becke, A. D. Density-functional thermochemistry. III. The role of exact exchange. J. Chem. Phys. 98, 5648-5652 (1993).
24. Lee, C., Yang, W. & Parr, R. G. Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density. Phys. Rev. B 37, 785-789 (1988).
25. Cornil, J. et al. Electronic and optical properties of polyfluorene and fluorene-based copolymers: A quantum-chemical characterization. J. Chem. Phys. 118, 6615-6623 (2003).
26. Accelrys, Inc. Cerius2 and Discover (programs) and Discover User Guide (Molecular Simulations, Inc., San Diego, 1996).
27. Ridley, J. & Zerner, M. C. An intermediate neglect of differential overlap technique for spectroscopy: Pyrrole and the azines. Theor. Chim. Acta 32, 111-134 (1973).
28. Mataga, N. & Nishimoto, K. Electronic structure and spectra of nitrogen heterocydes. Z. Phys. Chem. Neue. Folge. 13, 140-157 (1957).
29. Chan dross, M. Sc Mazumdar, S. Coulomb interactions and linear, nonlinear, and triplet absorption in poly(para-phenylenevinylene). Phys. Rev. B 55, 1497-1504 (1997).
30. Westenhoff, S. et al. Supramolecular electronic coupling in chiral oligothiqphene nanostructures. Adv. Mater. 18, 1281-1285 (2006).
31. Silva, C. et al. Exciton and polaron dynamics in a step-ladder polymeric semiconductor: The influence of interchain order. J. Phys. Condens. Matter 14, 9803-9824 (2002).