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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| s41467-024-46619-8.pdf | 1.71 MB | Adobe PDF | 見る/開く |
| タイトル: | Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter |
| 著者: | Ochi, Junki    https://orcid.org/0000-0003-4275-3898 (unconfirmed)Yamasaki, Yuki Tanaka, Kojiro Kondo, Yasuhiro Isayama, Kohei Oda, Susumu Kondo, Masakazu Hatakeyama, Takuji https://orcid.org/0000-0002-7483-9525 (unconfirmed) |
| 著者名の別形: | 越智, 純毅 田中, 恒次郎 畠山, 琢次 |
| キーワード: | Electronic devices Electronic materials Organic LEDs |
| 発行日: | 2-Apr-2024 |
| 出版者: | Springer Nature |
| 誌名: | Nature Communications |
| 巻: | 15 |
| 論文番号: | 2361 |
| 抄録: | An ultrapure deep-blue multi-resonance-induced thermally activated delayed fluorescence material (DOB2-DABNA-A) is designed and synthesized. Benefiting from a fully resonating extended helical π-conjugated system, this compound has a small ΔE[ST] value of 3.6 meV and sufficient spin–orbit coupling to exhibit a high-rate constant for reverse intersystem crossing (k[RISK] = 1.1 × 10⁶ s⁻¹). Furthermore, an organic light-emitting diode employing DOB2-DABNA-A as an emitter is fabricated; it exhibits ultrapure deep-blue emission at 452 nm with a small full width at half maximum of 24 nm, corresponding to Commission Internationale de l'Éclairage (CIE) coordinates of (0.145, 0.049). The high kRISC value reduces the efficiency roll-off, resulting in a high external quantum efficiency (EQE) of 21.6% at 1000 cd m⁻². |
| 著作権等: | © The Author(s) 2024 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
| URI: | http://hdl.handle.net/2433/290185 |
| DOI(出版社版): | 10.1038/s41467-024-46619-8 |
| PubMed ID: | 38565868 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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