Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter
Abstract 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 co...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-04-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-46619-8 |
| _version_ | 1797219663959031808 |
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| author | Junki Ochi Yuki Yamasaki Kojiro Tanaka Yasuhiro Kondo Kohei Isayama Susumu Oda Masakazu Kondo Takuji Hatakeyama |
| author_facet | Junki Ochi Yuki Yamasaki Kojiro Tanaka Yasuhiro Kondo Kohei Isayama Susumu Oda Masakazu Kondo Takuji Hatakeyama |
| author_sort | Junki Ochi |
| collection | DOAJ |
| description | Abstract 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 RISC = 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 k RISC value reduces the efficiency roll-off, resulting in a high external quantum efficiency (EQE) of 21.6% at 1000 cd m–2. |
| first_indexed | 2024-04-24T12:37:14Z |
| format | Article |
| id | doaj.art-5b4fcc453f7049e0a4efc3c6d14f98f3 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-24T12:37:14Z |
| publishDate | 2024-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-5b4fcc453f7049e0a4efc3c6d14f98f32024-04-07T11:24:32ZengNature PortfolioNature Communications2041-17232024-04-011511810.1038/s41467-024-46619-8Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitterJunki Ochi0Yuki Yamasaki1Kojiro Tanaka2Yasuhiro Kondo3Kohei Isayama4Susumu Oda5Masakazu Kondo6Takuji Hatakeyama7Department of Chemistry, Graduate School of Science, Kyoto UniversityDepartment of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin UniversityDepartment of Chemistry, Graduate School of Science, Kyoto UniversitySK JNC Japan Co., Ltd.SK JNC Japan Co., Ltd.Department of Applied Chemistry, Graduate School of Science and Engineering, Toyo UniversityJNC Co., Ltd.Department of Chemistry, Graduate School of Science, Kyoto UniversityAbstract 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 RISC = 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 k RISC value reduces the efficiency roll-off, resulting in a high external quantum efficiency (EQE) of 21.6% at 1000 cd m–2.https://doi.org/10.1038/s41467-024-46619-8 |
| spellingShingle | Junki Ochi Yuki Yamasaki Kojiro Tanaka Yasuhiro Kondo Kohei Isayama Susumu Oda Masakazu Kondo Takuji Hatakeyama Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter Nature Communications |
| title | Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter |
| title_full | Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter |
| title_fullStr | Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter |
| title_full_unstemmed | Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter |
| title_short | Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter |
| title_sort | highly efficient multi resonance thermally activated delayed fluorescence material toward a bt 2020 deep blue emitter |
| url | https://doi.org/10.1038/s41467-024-46619-8 |
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