Highly efficient phosphorescent emission from organic electroluminescent devices

M. A. Baldo, D. F. O'Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson and S. R. Forrest
Additional contact information
M. A. Baldo: Center for Photonics and Optoelectronic Materials, Princeton University
D. F. O'Brien: Center for Photonics and Optoelectronic Materials, Princeton University
Y. You: University of Southern California
A. Shoustikov: University of Southern California
S. Sibley: University of Southern California
M. E. Thompson: University of Southern California
S. R. Forrest: Center for Photonics and Optoelectronic Materials, Princeton University

Nature, 1998, vol. 395, issue 6698, 151-154

Abstract: Abstract The efficiency of electroluminescent organic light-emitting devices1,2 can be improved by the introduction3 of a fluorescent dye. Energy transfer from the host to the dye occurs via excitons, but only the singlet spin states induce fluorescent emission; these represent a small fraction (about 25%) of the total excited-state population (the remainder are triplet states). Phosphorescent dyes, however, offer a means of achieving improved light-emission efficiencies, as emission may result from both singlet and triplet states. Here we report high-efficiency (≳90%) energy transfer from both singlet and triplet states, in a host material doped with the phosphorescent dye 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphine platinum(II) (PtOEP). Our doped electroluminescent devices generate saturated red emission with peak external and internal quantum efficiencies of 4% and 23%, respectively. The luminescent efficiencies attainable with phosphorescent dyes may lead to new applications for organic materials. Moreover, our work establishes the utility of PtOEP as a probe of triplet behaviour and energy transfer in organic solid-state systems.

Date: 1998
References: Add references at CitEc
Citations: View citations in EconPapers (11)

Downloads: (external link)
https://www.nature.com/articles/25954 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:395:y:1998:i:6698:d:10.1038_25954

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/25954

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().