High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules

Sae Youn Lee, Takuma Yasuda, Hiroko Nomura, Chihaya Adachi

研究成果: ジャーナルへの寄稿学術誌査読

306 被引用数 (Scopus)

抄録

We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9 H-carbazol-9-yl)-9 H-carbazol-9-yl}-6-phenyl- 1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (ΔE ST 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11 ± 1 has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter.

本文言語英語
論文番号093306
ジャーナルApplied Physics Letters
101
9
DOI
出版ステータス出版済み - 8月 27 2012

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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