Spectroscopic study of spin-dependent exciton formation rates in π-conjugated semiconductors: Comparison with electroluminescence techniques

Physical Review B - Condensed Matter and Materials Physics

Volumn 70, Issue 24, 2004, Pages 1-4

  Yang, C ^a   Vardeny, Z V ^a   Kohler A ^b,c   Wohlgenannt, M ^d   Al Suti, M K ^e   Khan, M S ^e  

^a UNIVERSITY OF UTAH   (United States)

^b UNIVERSITY OF CAMBRIDGE   (United Kingdom)

^c UNIVERSITY OF POTSDAM   (Germany)

^d UNIVERSITY OF IOWA   (United States)

^e SULTAN QABOOS UNIVERSITY   (Oman)

Author keywords

[No Author keywords available]

Indexed keywords

MONOMER; POLYMER;

ARTICLE; ATOMIC PARTICLE; EXCITON; LUMINESCENCE; MATHEMATICAL ANALYSIS; NUCLEAR MAGNETIC RESONANCE; SEMICONDUCTOR;

EID: 14944356252     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.70.241202     Document Type: Article

References (21)

1. M. A. Baldo, D. F. O'Brien, M. E. Thompson, and S. R. Forrest, Phys. Rev. B 60, 14422 (1999).
2. Y. Cao, I. D. Parker, G. YU, C. Zhang, and A. J. Heeger, Nature (London) 397, 414 (1999).
3. J.-S. Kim, P. K. H. Ho, N. C. Greenham, and R. H. Friend, J. Appl. Phys. 88, 1073 (2000).
4. M. Wohlgenannt, K. Tandon, S. Mazumdar, S. Ramasesha, and Z. V. Vardeny, Nature (London) 409, 494 (2001).
5. J. S. Wilson, A. S. Dhoot, A. J. A. B. Seeley, M. S. Khan, A. Köhler, and R. H. Friend, Nature (London) 413, 828 (2001).
6. M. Wohlgenannt, X. M. Jiang, Z. V. Vardeny, and R. A. J. Janssen, Phys. Rev. Lett. 88, 197401 (2002).
7. A. S. Dhoot, D. S. Ginger, D. Beljonne, Z. Shuai, and N. C. Greenham, Chem. Phys. Lett. 360, 195 (2002).
8. M. Segal, M. A. Baldo, R. J. Holmes, S. R. Forrest, and Z. G. Soos, Phys. Rev. B 68, 075211 (2003).
9. M. Wohlgenannt, C. Yang, and Z. V. Vardeny, Phys. Rev. B 66, 241201(R) (2002).
10. M. S. Khan, M. R. A. Al-Mandhary, M. K. Al-Suti, P. R. Raithby, B. Ahrens, L. Male, R. H. Friend, A. Köhler, and J. Wilson, J. Chem. Soc. Dalton Trans., 1 65 (2003).
11. J. S. Wilson, A. Köhler, R. H. Friend, M. K. Al-Suti, M. R. A. Al-Mandhary, M. S. Khan, and P. R. Raithby, J. Chem. Phys. 113, 7627 (2000).
12. Z. V. Vardeny and X. Wei, in Handbook of Conducting Polymers II (Marcel Dekker, New York, 1997), Chap. 22.
13. M. Wohlgenannt and Z. V. Vardeny, J. Phys.: Condens. Matter 15, 83(R) (2003).
14. M. Wohlgenannt, Phys. Status Solidi A 201, 1188 (2004).
15. J. Seixas de Melo, L. M. Silva, L. G. Arnaut, and R. S. Becker, J. Chem. Phys. 111, 5427 (1999).
16. N. Chawdhury, A. Kohler, R. H. Friend, M. Younus, N. J. Long, P. R. Raithby, and J. Lewis, Macromolecules 31, 722 (1998).
17. J. Wilson, Ph.D. thesis, University of Cambridge, UK, 2001.
18. 1 band in the monomer. This suggests that small amounts of unpolymerized monomer may be present in the polymer samples. However, this can be excluded based on the chemical synthesis route used. We therefore conjecture that the signal at 0.4 eV may be caused by end groups of the polymer chain.
19. M. Wohlgenannt, X. M. Jiang, and Z. V. Vardeny, Phys. Rev. B 69, 241204(R) (2004).
20. N. C. Greenham, J. Shinar, J. Partee, P. A. Lane, O. Amir, F. Lu, and R. H. Friend, Phys. Rev. B 53, 13528 (1996).
21. L. S. Swanson, J. Shinar, A. R. Brown, D. D. C. Bradley, R. H. Friend, P. L. Burn, A. Kraft, and A. B. Holmes, Phys. Rev. B 46, 15072 (1992).