Highly effi cient solution-processed host-free organic light-emitting diodes showing an external quantum effi ciency of nearly 18% with a thermally activated delayed fl uorescence emitter

Yoshimasa Wada, Katsuyuki Shizu, Shosei Kubo, Tatsuya Fukushima, Takuya Miwa, Hiroyuki Tanaka, Chihaya Adachi, Hironori Kaji

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We demonstrate solution-processed host-free organic light-emitting diodes (OLEDs) using a thermally activated delayed fluorescence emitter 10-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-9,9-dimethylacridan (DMAC-TRZ). A spin-coated neat DMAC-TRZ film shows weak concentration quenching, leading to a high photoluminescence quantum yield (PLQY) of 84%. OLEDs containing a neat film of DMAC-TRZ display a maximum external quantum efficiency (EQE) of 17.6%. Both the PLQY and EQE are the highest reported for solution-processed host-free films and OLEDs, respectively. In addition, the OLEDs exhibit an EQE of 16.8% at high luminance (over 400 cd m%2).

Original languageEnglish
Article number032102
JournalApplied Physics Express
Volume9
Issue number3
DOIs
Publication statusPublished - Mar 2016

All Science Journal Classification (ASJC) codes

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

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