Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters

Qisheng Zhang, Daniel Tsang, Hirokazu Kuwabara, Yasuhiro Hatae, Bo Li, Takehiro Takahashi, Sae Youn Lee, Takuma Yasuda, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

323 Citations (Scopus)

Abstract

The design of efficient and concentration-insensitive metal-free thermally activateddelayed fluorescence (TADF) materials is reported. Blue and green organic light-emitting diodes (OLEDs) containing a hole-transport layer, an undoped TADF emissive layer, and an electron-transport layer achieve maximum external quantum efficiencies of 19%, which is comparable to the best doped OLEDs.

Original languageEnglish
Pages (from-to)2096-2100
Number of pages5
JournalAdvanced Materials
Volume27
Issue number12
DOIs
Publication statusPublished - Mar 25 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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