Correlating structure with fluorescence emission in phase-separated conjugated-polymer blends

Nature Materials

Volumn 2, Issue 9, 2003, Pages 616-621

  Chappell, John ^a   Lidzey, David G ^a   Jukes, Paul C ^a   Higgins, Anthony M ^a   Thompson, Richard L ^b   O'Connor, Stephen ^c   Grizzi, Ilaria ^c   Fletcher, Robert ^d   O'Brien, Jim ^d   Geoghegan, Mark ^d   Jones, Richard A L ^a  

^a UNIVERSITY OF SHEFFIELD   (United Kingdom)

^b DURHAM UNIVERSITY   (United Kingdom)

^c Cambridge Display Technology Ltd   (United Kingdom)

^d DOW CHEMICAL COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

FLUORESCENCE; INTERFACES (MATERIALS); LIGHT EMITTING DIODES; MORPHOLOGY; NUCLEAR PROPERTIES; OPTICAL MICROSCOPY; PHASE SEPARATION; SEMICONDUCTING POLYMERS; STRUCTURE (COMPOSITION); THIN FILMS; WETTING;

COMPLEX STRUCTURE; CONJUGATED-POLYMER BLENDS; SCANNING FORCE MICROSCOPY; SCANNING NEAR-FIELD OPTICAL MICROSCOPY;

POLYMER BLENDS;

BENZO 1,2,3 THIADIAZOLE; BENZO-1,2,3-THIADIAZOLE; FLUORENE DERIVATIVE; POLYMER; THIADIAZOLE DERIVATIVE;

ARTICLE; CHEMISTRY; CRYSTALLIZATION; CRYSTALLOGRAPHY; ELECTROCHEMISTRY; FLUORESCENCE; INSTRUMENTATION; METHODOLOGY; NANOTECHNOLOGY; PHOTOCHEMISTRY; SPECTROFLUOROMETRY; STATISTICS; STRUCTURE ACTIVITY RELATION; SURFACE PROPERTY;

CRYSTALLIZATION; CRYSTALLOGRAPHY; ELECTROCHEMISTRY; FLUORENES; FLUORESCENCE; NANOTECHNOLOGY; PHOTOCHEMISTRY; POLYMERS; SPECTROMETRY, FLUORESCENCE; STATISTICS; STRUCTURE-ACTIVITY RELATIONSHIP; SURFACE PROPERTIES; THIADIAZOLES;

EID: 0141921418     PISSN: 14761122     EISSN: None     Source Type: Journal    
DOI: 10.1038/nmat959     Document Type: Article

References (35)

1. Friend, R. H. et al. Electroluminescence in conjugated polymers. Nature 397, 121-128 (1999).
2. Bernius, M. T., Inbasekaran, M., O'Brien, J. & Wu, W. Progress with light-emitting polymers. Adv. Mater. 12, 1737-1750 (2000).
3. Wilkinson, C. I. et al. Enhanced performance of pulse driven small area polyfluorene light emitting diodes. Appl. Phys. Lett. 79, 171-173 (2001).
4. Morgado, J., Friend, R. H. & Cacialli, F. Improved efficiency of light-emitting diodes based on polyfluorene blends upon insertion of a poly(p-phenylene vinylene) electron-confinement layer. Appl. Phys. Lett. 80, 2436-2438 (2002).
5. Halls, J. J. M. et al. Efficient photodiodes from interpenetrating polymer networks. Nature 376, 498-500 (1995).
6. van Hutten, P.F., Krasnikov, V. V. & Hadziioannou, G. in Conjugated Polymer and Molecular Interfaces (eds Salaneck, W., Seki, K., Kahn, A. & Pireaux, J. J.) 113-142 (Marcel Dekker, New York, 2001).
7. Chen, L. et al. Excitation transfer in polymer photodiodes for enhanced quantum efficiency. Adv. Mater. 12, 1110-1114 (2000).
8. Arias, A. C. et al. Vertically segregated polymer-blend photovoltaic thin-film structures through surface-mediated solution processing. Appl. Phys. Lett. 80, 1695-1697 (2002).
9. Campbell, A. J. et al. in Proceedings of SPIE 2002 4464 (ed. Kafafi Z. H.) 211-222 (SPIE, Washington, 2002).
10. Geoghegan, M. & Krausch, G. Wetting at polymer surfaces and interfaces. Prog. Polym. Sci. 28, 261-302 (2003).
11. Halls, J. J. M. et al. Photodiodes based on polyfluorene composites: influence of morphology. Adv. Mater. 12, 498-502 (2000).
12. Halls, J. J. M., Pichler, K., Friend, R. H., Moratti, S. C. & Holmes, A. B. Exciton diffusion and dissociation in a poly(p-phenylenevinylene)/C-60 heterojunction photovoltaic cell. Appl. Phys. Lett. 68, 3120-3122 (1996).
13. Stoessel, M. et al. Cathode-induced luminescence quenching in polyfluorene. J. Appl. Phys. 87, 4467-445 (2000).
14. Snaith, H. J., Arias, A. C., Morteani, A. C., Silva, C. & Friend, R. H. Charge generation kinetics and transport mechanisms in blended polyfluorene photovoltaic devices. Nano Lett. 2, 1353-1357 (2002).
15. Moons, E. Conjugated polymer blends: linking film morphology to performance of light emitting diodes and photodiodes. J. Phys. Condens. Matter 14, 12235-12260 (2002).
16. Corcoran, N., Arias, A. C., Kim, J. S., MacKenzie, J. D. & Friend, R. H. Increased efficiency in vertically segregated thin-film conjugated polymer blends for light-emitting-diodes. Appl. Phys. Lett. 82, 299-301 (2003).
17. Ariu, M. et al. The effect of morphology on the temperature-dependent photoluminescence quantum efficiency of the conjugated polymer poly(9,9-dioctylfluorene). J. Phys. Condens. Matter 14, 9975-9986 (2002).
18. Redecker, M., Bradley, D. D. C., Inbasekaran, M. & Woo, E. P. Nondispersive hole transport in an electroluminescent polyfluorene. Appl. Phys. Lett. 73, 1565-1567 (1998).
19. Herguth, P., Jiang, X., Liu, M. S. & Jen, A. K. Y. Highly efficient fluorene- and benzothiadiazole-based conjugated copolymers for polymer light-emitting diodes. Macromolecules 35 6094-6100 (2002).
20. Campbell, A. J., Bradley, D. D. C. & Antoniadis, H. Dispersive electron transport in an electroluminescent polyfluorene copolymer measured by the current integration time-of-flight method. Appl. Phys. Lett. 79, 2133-2135 (2001).
21. Buckley, A. R. et al. Energy transfer dynamics in polyfluorene-based polymer blends. Chem. Phys. Lett. 339 331-336 (2001).
22. Wei, P. K., Hsu, J. H. & Fann, W. S. Study of conjugated polymer blend films by a near field scanning optical microscopy. Synth. Met. 102, 1209-1210 (1999).
23. DeAro, J. A., Weston, K. D., Burratto, S. K. & Lemmer, U. Mesoscale optical properties of conjugated polymers probed by near-field scanning optical microscopy. Chem. Phys. Lett. 277, 532-538 (1997).
24. Chappell, J. & Lidzey, D. G. Phase-separation in polyfluorene-polymethylmethacrylate blends studied using UV near-field microscopy. J. Microsc. 209, 188-193 (2003).
25. Webster, S., Smith, D. A., Batchelder, D. N., Lidzey, D. G. & Bradley, D. D. C. Application of fluorescence scanning near-field optical microscopy to the study of phase-separated conjugated polymers. Ultramicroscopy 71, 275-279 (1998).
26. Stevenson, R., Granström, M. & Richards, D. Fluorescence scanning near-field optical microscopy of conjugated polymer blends. Appl. Phys. Lett. 75, 1574-1576 (1999).
27. Stevenson, R. et al. Ultraviolet-visible near-field microscopy of phase-separated blends of polyfluorene-based conjugated semiconductors. Appl. Phys. Lett. 79, 833-835 (2001).
28. Stevenson, R. et al. Fluorescence scanning near-field optical microscopy of polyfluorene composites. J. Microsc. 202, 433-438 (2001).
29. Morgado, J., Moons, E., Friend, R. H. & Cacialli, F. De-mixing of polyfluorene-based blends by contact with acetone: electro- and photo-luminescent probes. Adv. Mater. 13, 810-814 (2001).
30. Hecht, B., Bielefeldt, H., Inouye, Y., Pohl, D. W. & Novotny, L. Facts and artefacts in near-field optical microscopy. J. Appl. Phys. 81, 2492-2498 (1997).
31. 4He reaction to study polymer diffusion in polymer melts Nucl. Instrum. Meth. B 42, 130-134 (1989).
32. Geoghegan, M. in Polymer Surfaces and Interfaces III (eds Richards, R. W. & Peace, S. K.) 43-73 (Wiley, Chichester, 1999).
33. Grell, M., Bradley, D. D. C., Inbasekaran, M. & Woo, E. P. A glass-forming conjugated main-chain liquid crystal polymer for polarized electroluminescence applications. Adv. Mater. 9, 798-803 (1997).
34. Grimsdale, A. C. et al. Correlation between molecular structure, microscopic morphology and optical properties of poly(tetraalkylindenofluorene)s. Adv. Funct. Mater. 12, 729-733 (2002).
35. Ariu, M. et al. A study of the different structural phases of the polymer poly(9,9-dioctylfluorene) using Raman spectroscopy. Synth. Met. 116, 217-221 (2001).