Measurement of photoluminescence efficiency of Ir(III) phenylpyridine derivatives in solution and solid-state films

Ayataka Endo, Kengo Suzuki, Toshitada Yoshihara, Seiji Tobita, Masayuki Yahiro, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

We compared the photoluminescence efficiency (ΦPL) of fac-tris(2-phenylpyridine)iridium (Ir(ppy)3) and derivatives of it in solution and in doped solid-state films and estimated their radiative and nonradiative decay rates. The green phosphor of Ir(ppy)3 and blue phosphors of FIrpic, Ir(Fppy)3, FIr6 showed high ΦPL values approaching to 100% in both solution and doped solid-state films. On the other hand, the red phosphor of Btp2Ir(acac) showed lower ΦPL value less than 40% in both environments. Photoacoustic spectroscopy results indicated that for Btp2Ir(acac) nonradiative decay from the triplet state to the ground states is 64 ± 8%.

Original languageEnglish
Pages (from-to)155-157
Number of pages3
JournalChemical Physics Letters
Volume460
Issue number1-3
DOIs
Publication statusPublished - Jul 20 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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