Applied Physics Letters
Feedback | Help | Exit
Applied Physics Letters
   
 
 
 
Previous Article
Oblique Hanle measurements of InAs/GaAs quantum dot spin-light emitting diodes
We report on studies of electrical spin injection from ferromagnetic Fe contacts into semiconductor light emitting diodes containing single layers of InAs/GaAs self-assembled quantum dots (QDs). An ob...
Next Article
Cross-sectional imaging of sharp Si interlayers embedded in gallium arsenide
We investigate the electronic properties of the (110) cross-sectional surface of Si-doped GaAs using first-principles techniques. We focus on doping configurations with an equal concentration of Si im...

Effects of ferromagnetic nanowires on singlet and triplet exciton fractions in fluorescent and phosphorescent organic semiconductors

Appl. Phys. Lett. 88, 022114 (2006); doi:10.1063/1.2162801

Published 12 January 2006

You are not logged in to this journal. Log in

Bin Hu and Yue Wu
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996

Zongtao Zhang and Sheng Dai
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

Jian Shen
Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
We report a magnetic field-dependent electroluminescence (EL) induced by ferromagnetic Co53Pt47 nanowires in fluorescent conjugated polymer poly[2-methoxy-5-(2[prime]-ethylhexyloxy)-1,4-phenylenevinylene] and phosphorescent iridium-complex Ir(ppy)3 molecules. The photoluminescence and EL studies indicate that the dispersed CoPt nanowires increase the singlet-to-triplet exciton ratio in organic semiconductors, suggesting that the spin-polarized holes were injected into the organic molecules from the CoPt nanowires under electrical excitation. Therefore, the use of ferromagnetic nanomaterials demonstrates a pathway to tune the optoelectronic properties that are related to singlet and triplet states in organic semiconducting materials. ©2006 American Institute of Physics
History: Received 12 September 2005; accepted 24 November 2005; published 12 January 2006
Permalink: http://link.aip.org/link/?APPLAB/88/022114/1
BUY THIS ARTICLE   (US$28)
Download HTML Download Sectioned HTML Download PDF (77 kB) View Cart

KEYWORDS and PACS

Keywords
PACS
  • 78.66.Qn
    Optical properties of polymers; organic compounds (thin films)
  • 73.40.Ns
    Electrical properties of metal–nonmetal contacts
  • 78.60.Fi
    Electroluminescence (condensed matter)
  • 78.55.Kz
    Photoluminescence in solid organic materials
  • 71.35.-y
    Excitons and related phenomena
  • YEAR: 2006

RELATED DATABASES


To view database links for this article,
you need to log in.
To view database links for this article,
you need to log in.

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (23)
View in Separate Window/Tab
For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. C. Taliani, V. Dediu, F. Biscarini, M. Cavallini, M. Murgia, G. Ruani, and P. Nozar, Phase Transitions 75, 1049 (2002).
  2. Z. H. Xiong, D. Wu, Z. V. Vardeny, and J. Shi, Nature (London) 427, 821 (2004).
  3. V. Dediu, M. Murgia, F. C. Matacotta, C. Taliani, and S. Barbanera, Solid State Commun. 122, 181 (2002).
  4. P. P. Ruden and D. L. Smith, J. Appl. Phys. 95, 4898 (2004).
  5. Z. T. Zhang, D. A. Blom, Z. Gai, J. R. Thompson, J. Shen, and S. Dai, J. Am. Ceram. Soc. 125, 7528 (2003).
  6. J. Kalinowski, M. Cocchi, D. Virgili, P. D. Marco, and V. Fattori, Chem. Phys. Lett. 380, 710 (2003).
  7. G. Salis, S. F. Alvarado, M. Tschudy, T. Brunschwiler, and R. Allenspach, Phys. Rev. B 70, 085203 (2004).
  8. V. Ern and R. E. Merrifield, Phys. Rev. Lett. 21, 609 (1968).
  9. W. J. Finkenzeller and H. Yersin, Chem. Phys. Lett. 377, 299 (2003).
  10. A. H. Davis and K. Bussmann, J. Vac. Sci. Technol. A 22, 1885 (2004).
  11. J. Wilkinson, A. H. Davis, K. Bussmann, and J. P. Long, Appl. Phys. Lett. 86, 111109 (2005).
  12. U. E. Steiner and T. Ulrich, Chem. Rev. (Washington, D.C.) 89, 51 (1989).
  13. Ö. Mermer, G. Veeraraghavan, T. L. Francis, and M. Wohlgenannt, Solid State Commun. 134, 631 (2005).
  14. R. H. Friend, R. W. Gymer, A. B. Holmes, J. H. Burroughes, R. N. Marks, C. Taliani, D. D. C. Bradley, D. A. DOS Santos, J. L. Brédas, M. Lögdlund, and W. R. Salaneck, Nature (London) 397, 121 (1999).
  15. M. Segal, M. A. Baldo, R. J. Holmes, S. R. Forrest, and Z. G. Soos, Phys. Rev. B 68, 075211 (2003).
  16. N. J. Turro, Mordern Molecular Photochemistry (University Science Books, CA, 1991).
  17. M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson, and S. R. Forrest, Appl. Phys. Lett. 75, 4 (1999).
  18. A. H. Davis and K. Bussmann, J. Appl. Phys. 93, 7358 (2003).
  19. I. Bergenti, V. Dediu, E. Arisi, T. Mertelj, M. Murgia, A. Riminucci, G. Ruani, M. Solzi, and C. Taliani, Org. Electron. 5, 309 (2004).
  20. U. E. Steiner and T. Ulrich, Chem. Rev. (Washington, D.C.) 89, 51 (1989).
  21. E. L. Frankevich, Chem. Phys. 297, 315 (2004).
  22. V. Dyakonov and E. Frankevich, Chem. Phys. 227, 203 (1998).
  23. A. Kashyap, K. B. Garg, A. K. Solanki, T. Nautiyal, and S. Auluck, Phys. Rev. B 60, 2262 (1999).

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.


Copyright © American Institute of Physics