DOI: 10.1002/adfm.200304334. Electrophosphorescence from a Polymer Guest–Host System with an Iridium Complex as Guest: Förster Energy Transfer and Charge Trapping

Electrophosphorescence from a Polymer Guest–Host System with an Iridium Complex as Guest: Förster Energy Transfer and Charge Trapping

10.1002/adfm.200304334

Crossref journal-article

Wiley

Advanced Functional Materials (311)

Abstract

AbstractWe report high‐efficiency green electrophosphorescent light‐emitting diodes obtained by using tris[9,9‐dihexyl‐2‐(phenyl‐4′‐(‐pyridin‐2″‐yl))fluorene]iridium(III) (Ir(DPPF)3) as the guest, and a blend of poly(vinylcarbazole) (PVK) with 2‐tert‐butylphenyl‐5‐biphenyl‐1,3,4‐oxadiazol (PBD) as the host. The electrophosphorescent emission is characteristic of Ir(DPPF)3, with its maximum at 550 nm. An external quantum efficiency of 8 % photons per electron and luminous efficiency of 29 cd A–1, with maximum brightness of 3500 cd m–2, were achieved at 1 wt.‐% concentration of Ir(DPPF)3. The devices exhibited no emission from PVK or PBD, even at the lowest concentration of Ir(DPPF)3 (0.1 wt.‐%). The results indicate that Förster energy transfer plays a minor role in achieving high efficiencies in these devices. Direct charge trapping appears to be the main operating mechanism.

Bibliography

Gong, X., Ostrowski, J. C., Moses, D., Bazan, G. C., & Heeger, A. J. (2003). Electrophosphorescence from a Polymer GuestâHost System with an Iridium Complex as Guest: FÃ¶rster Energy Transfer and Charge Trapping. Advanced Functional Materials, 13(6), 439â444. Portico.

Authors 5

X. Gong (first)
J.C. Ostrowski (additional)
D. Moses (additional)
G.C. Bazan (additional)
A.J. Heeger (additional)

References 37 Referenced 310

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Dates

Type	When
Created	22 years, 3 months ago (June 6, 2003, 7:07 a.m.)
Deposited	1 year, 9 months ago (Nov. 16, 2023, 8:35 p.m.)
Indexed	1 month, 1 week ago (July 30, 2025, 10:16 a.m.)
Issued	22 years, 3 months ago (June 5, 2003)
Published	22 years, 3 months ago (June 5, 2003)
Published Online	22 years, 3 months ago (June 5, 2003)
Published Print	22 years, 3 months ago (June 5, 2003)

Funders 0

None

BibTeX

@article{Gong_2003, title={Electrophosphorescence from a Polymer Guest–Host System with an Iridium Complex as Guest: Förster Energy Transfer and Charge Trapping}, volume={13}, ISSN={1616-3028}, url={http://dx.doi.org/10.1002/adfm.200304334}, DOI={10.1002/adfm.200304334}, number={6}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Gong, X. and Ostrowski, J.C. and Moses, D. and Bazan, G.C. and Heeger, A.J.}, year={2003}, month=jun, pages={439–444} }

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