Near-quantitative internal quantum efficiency in a light-emitting electrochemical cell

Henk J. Bolink, Eugenio Coronado, Rubén D. Costa, Nora Lardiés, Enrique Ortí

Research output: Contribution to journalArticle

138 Citations (Scopus)

Abstract

A green-light-emitting iridium(III) complex was prepared that has a photoluminescence quantum yield in a thin-film configuration of almost unity. When used in a simple solid-state single-layer light-emitting electrochemical cell, it yielded an external quantum efficiency of nearly 15% and a power efficiency of 38 Lm/W. We argue that these high external efficiencies are only possible if near-quantitative internal electron-to-photon conversion occurs. This shows that the limiting factor for the efficiency of these devices is the photoluminescence quantum yield in a solid film configuration. The observed efficiencies show the prospect of these simple electroluminescent devices for lighting and signage applications.

Original languageEnglish
Pages (from-to)9149-9151
Number of pages3
JournalInorganic Chemistry
Volume47
Issue number20
DOIs
Publication statusPublished - 2008 Oct 20
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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