Energy-transfer dynamics of blue-phosphorescent iridium and rhodium complexes doped in fluorescent molecules

Journal of the Society for Information Display

Volumn 16, Issue 6, 2008, Pages 695-701

  Tanaka, Isao ^a   Shibata, Kazuyuki ^b   Tokunaga, Eiji ^b   Tokito, Shizuo ^a  

^a NHK SCIENCE AND TECHNICAL RESEARCH LABORATORIES   (Japan)

^b TOKYO UNIVERSITY OF SCIENCE   (Japan)

Author keywords

Dexter energy transfer; Forster energy transfer; Heavy ion effect; Iridium; Organic light emitting device; Phosphorescence; Photoluminescence; Rhodium

Indexed keywords

ALUMINA; ATOMIC PHYSICS; ATOMS; ENERGY TRANSFER; IRIDIUM; IRIDIUM COMPOUNDS; LUMINESCENCE; MOLECULES; PHOSPHORESCENCE; PHOTOLUMINESCENCE; PLASTIC PRODUCTS; RHODIUM; RHODIUM COMPOUNDS; SOLIDS; THICK FILMS; THIN FILM DEVICES; THIN FILMS;

ACETYLACETONATE; DEXTER ENERGY TRANSFER; DIFLUOROPHENYL; DOPING; EXTERNAL-; FLUORESCENT MOLECULES; FORSTER ENERGY TRANSFER; HEAVY-ION EFFECT; HYDROXYQUINOLINE; ORGANIC LIGHT-EMITTING DEVICE; PHOSPHORESCENT MOLECULES; PHOTOLUMINESCENCE INTENSITIES; PHOTOLUMINESCENCE SPECTRUM; RHODIUM COMPLEXES; TIME-RESOLVED; TRIPLET ENERGIES; TRIPLET ENERGY TRANSFERS;

LIGHT EMISSION;

EID: 54249120959     PISSN: 10710922     EISSN: None     Source Type: Journal    
DOI: 10.1889/1.2938872     Document Type: Conference Paper

References (25)

1. P. W. Atkins, Quanta: A Handbook of Concepts, 2nd edn. (Oxford University Press, 1991).
2. For a review, see: Highly Efficient OLEDs with Phosphorescent Materials, H, Yersin, ed. (Wiley-VCH, 2007).
3. M. A, Baldo, D. F. O'Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, and S. R. Forrest, "Highly efficient phosphorescent emission from organic electroluminescent devices," Nature 395, 151-154 (1998).
4. M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson, and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phy. Lett. 75, 4-6 (1999).
5. K. A. King, P. J. Spellane, and R. J. Watts, "Excited-state properties of a triply ortho-metalatediridium(III) complex," J. Am. Chem. Soc. 107, 1431-1432 (1985).
6. 3+ complexes: Their synthesis, structure, and optical spectroscopic properties," Inorg. Chem. 33, 545-550 (1994).
7. S. Lamansky, P. Djurovich, D. Murphy, F. Abdel-Razzaq, H.-E. Lee, C. Adachi, P. E. Burrows, S. R. Forrest, and M. E. Thomson, "Highly phosphorescent bis-cyclometalated iridium complexes: Synthesis, photophysical characterization, and use in organic light emitting diodes," J. Am. Chem. Soc. 123, 4304-4312 (2001).
8. 3. Temperature dependence, decay dynamics, and magnetic field properties," Chem. Phys. Lett. 377, 299-305 (2003).
9. 3]," J. Chin. Chem. Soc. 53, 101-112 (2006).
10. I. Tanaka, Y. Tabata, and S. Tokito, "Observation of phosphorescence from tris(8-hydroxyquinolme) aluminum thin films using triplet, energy transfer from iridium complexes," Phys. Rev. B71, 205207 (2005).
11. I. Tanaka and S. Tokito, "Phosphorescent-sensitized triplet-triplet annihilation in tris(8-hydroxyquinoline) aluminum," J. Appl. Phys. 97, 113532 (2005).
12. 3 molecules," J. Appl. Phys. 99, 073501 (2006).
13. H.-H. Liao, C.-M. Yang, C.-H. Wu, S.-F. Horng, W.-S. Lee, H.-F. Menga, J.-T. Shy, and C.-S. Hsu, "Large enhancement, of intersystem crossing in polyfluorenes by iridium-complex doping," Appl. Phys. Lett. 90, 013504 (2007).
14. S. Pankasem, J. Kuczynski, and J. K. Tilomas, "Photochemistry and photodegradation of polycarbonate," Macromalecules 27, 3773-3781 (1994).
15. C. Adachi, R. C. Kwong, P. Djurovich, V. Adamovich, M. A. Baldo, M. E. Thompson, and S. R. Forrest, "Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent, emission in organic materials," Appl. Phys. Lett. 79, 2082-2084 (2001).
16. I. Tanaka, Y. Tabata, and S. Tokito, "Energy-transfer and light-emission mechanism of blue phosphorescent, molecules in guest-host systems," Chem. Phys. Lett. 400, 86-89 (2004).
17. Y. Kawamura, K. Goushi, J. Brooks, J. J. Brown, H. Sasabe, and C. Adachi, "100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films," Appl. Phys. Lett. 86, 071104 (2005).
18. 3 in a solid matrix at low temperatures," Jpn. J. Appl. Phys. 43, L937-L939 (2004).
19. I. Tanaka and S. Tokito, "Temperature-dependent carrier-transport and light-emission processes in a phosphorescent organic light-emitting device," Appl. Phys. Lett. 87, 173509 (2005).
20. 2Ir(acac)," Jpn. J. Appl. Phys. 43, LI60I-LI603 (2004).
21. M. Maestri, D. Sandrini, V. Balzani, A. von Zelewsky, C. DeuschelCornioley, and P. Jolliet, "Absorption spectra and luminescence properties of isomeric platinum(II) and palladium(II) complexes containing 1,1-biphenyldiyl, 2-phenylpyridine, and 2,2-bijpyridine as ligands," Helv. Chim. Acta 71, 1053-1059 (1988).
22. J. B. Birks, G. F. Moore, and I. H. Munro, "Delayed excimer fluorescence," Spectrochim, Acta 22, 323-331 (1966).
23. T. Förster, "Transfer mechanisms of electronic excitation," Discuss Faraday Soc. 27, 7-17 (1959).
24. Y. Kawamura, J. Brooks, J. J. Brown, H. Sasabe, and C. Adachi, "Intermolecular interaction and a concentration-quenching Mechanism of phosphorescent Ir(III) complexes in a solid film," Phys. Rev. Lett. 96, 017404 (2006).
25. D. L. Dexter, "A theory of sensitized luminescence in solids," J. Chem. Phys. 21, 836-850 (1953).