Single molecule solid state light emitting electrochemical cells with lifetimes superior to 3000 hours

Rubén D. Costa, Henk J. Bolink, Enrique Ortí, Michele Sessolo, Stefan Graber, Kevin Doyle, Markus Neuburger, Catherine E. Housecraft, Edwin C. Constable

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We will present a breakthrough in the stability of the simplest light-emitting electrochemical cells (LECs). The main drawback of these molecular devices limiting their practical use are their short lifetimes, which range from several minutes to a few days due to intrinsic instabilities of the ionic transition-metal complex (iTMC's). By using an ionic iridium(III) complex conveniently designed to form a supramolecularly-caged structure, we show that the lifetime of LECs can be increased to more than 3000 hours at an average luminance of 200 cd m-2 while operating at a bias of only 3 volts. In order to reduce the turn-on time to a few minutes small amount of ionic liquid (IL) were added and short pulses of higher-voltage were applied at the start.

Original languageEnglish
Title of host publicationOrganic and Hybrid Materials for Large-Area Functional Systems
Pages61-67
Number of pages7
Publication statusPublished - 2008
Externally publishedYes
Event2008 MRS Fall Meeting - Boston, MA, United States
Duration: 2008 Dec 12008 Dec 5

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1114
ISSN (Print)0272-9172

Conference

Conference2008 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period08/12/108/12/5

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Costa, R. D., Bolink, H. J., Ortí, E., Sessolo, M., Graber, S., Doyle, K., Neuburger, M., Housecraft, C. E., & Constable, E. C. (2008). Single molecule solid state light emitting electrochemical cells with lifetimes superior to 3000 hours. In Organic and Hybrid Materials for Large-Area Functional Systems (pp. 61-67). (Materials Research Society Symposium Proceedings; Vol. 1114).