Simple accurate system for measuring absolute photoluminescence quantum efficiency in organic solid-state thin films

Yuichiro Kawamura, Hiroyuki Sasabe, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

219 Citations (Scopus)

Abstract

We accurately measured the absolute photoluminescence (PL) quantum efficiency (ηPL) of organic solid-state thin films using an integrating sphere. We particularly measured the ηPL of conventional organic materials used in organic light emitting diodes, such as a tris(8-quinolionolato) aluminum(III) complex (Alq3), and a 2 wt%-/fac-tris(2-phenylpyridyl) iridium(III): 4,4′-bis(carbazol-9-yl)-2,2′-biphenyl [Ir(ppy) 3:CBP] co-deposited film. Alq3 and Ir(ppy)3:CBP showed a ηPL = 20 ± 1% and 97 ± 2%, which corresponded well to external electroluminescence efficiency using these materials. We also measured their transient PL decay and determined the radiative rate constants with their ηPL.

Original languageEnglish
Pages (from-to)7729-7730
Number of pages2
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number11 A
DOIs
Publication statusPublished - Nov 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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