Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED
Abstract Blue emission is crucial for quality white lighting sources. Delving into precise exciton management in the subtle chemical design using organic materials and understanding key insights into organic light-emitting diode efficiency is of prime importance. Herein, we envision a simple design...
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Nature Portfolio
2025-05-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59893-x |
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| author | Debasish Barman Youichi Tsuchiya Chihaya Adachi |
| author_facet | Debasish Barman Youichi Tsuchiya Chihaya Adachi |
| author_sort | Debasish Barman |
| collection | DOAJ |
| description | Abstract Blue emission is crucial for quality white lighting sources. Delving into precise exciton management in the subtle chemical design using organic materials and understanding key insights into organic light-emitting diode efficiency is of prime importance. Herein, we envision a simple design strategy combining short-range charge transfer with main long-range charge transfer and synchronizing their complementary advantages to afford a new paradigm of multi-resonance charge transfer-type thermally activated delayed fluorescence emitters. Modifying the auxiliary push-pull connection between a carbazole donor and a boron-based acceptor core, we construct C-C bond extended DBACzPh and DBADCzPh emitters with strong thermally activated delayed fluorescence emission in solution and thin films. Preferential 100% horizontal molecular orientation results in balanced bipolar carrier transport and effective host-to-dopant energy transfer in a high-polarity host matrix. Thereby, DBADCzPh significantly boosts outcoupling efficiency. This design achieves sky-blue electroluminescence with a very high external quantum efficiency of over 40%, paving the way for future advancements in emitter designs for high-efficiency OLEDs. |
| format | Article |
| id | doaj-art-165fbbd450a843de9d4add64a4ef5b0c |
| institution | DOAJ |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-165fbbd450a843de9d4add64a4ef5b0c2025-08-20T03:22:03ZengNature PortfolioNature Communications2041-17232025-05-0116111610.1038/s41467-025-59893-xHorizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLEDDebasish Barman0Youichi Tsuchiya1Chihaya Adachi2Center for Organic Photonics and Electronics Research (OPERA), Kyushu UniversityCenter for Organic Photonics and Electronics Research (OPERA), Kyushu UniversityCenter for Organic Photonics and Electronics Research (OPERA), Kyushu UniversityAbstract Blue emission is crucial for quality white lighting sources. Delving into precise exciton management in the subtle chemical design using organic materials and understanding key insights into organic light-emitting diode efficiency is of prime importance. Herein, we envision a simple design strategy combining short-range charge transfer with main long-range charge transfer and synchronizing their complementary advantages to afford a new paradigm of multi-resonance charge transfer-type thermally activated delayed fluorescence emitters. Modifying the auxiliary push-pull connection between a carbazole donor and a boron-based acceptor core, we construct C-C bond extended DBACzPh and DBADCzPh emitters with strong thermally activated delayed fluorescence emission in solution and thin films. Preferential 100% horizontal molecular orientation results in balanced bipolar carrier transport and effective host-to-dopant energy transfer in a high-polarity host matrix. Thereby, DBADCzPh significantly boosts outcoupling efficiency. This design achieves sky-blue electroluminescence with a very high external quantum efficiency of over 40%, paving the way for future advancements in emitter designs for high-efficiency OLEDs.https://doi.org/10.1038/s41467-025-59893-x |
| spellingShingle | Debasish Barman Youichi Tsuchiya Chihaya Adachi Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED Nature Communications |
| title | Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED |
| title_full | Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED |
| title_fullStr | Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED |
| title_full_unstemmed | Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED |
| title_short | Horizontally oriented MRCT-type TADF emitter achieving EQE over 40% for Sky-Blue OLED |
| title_sort | horizontally oriented mrct type tadf emitter achieving eqe over 40 for sky blue oled |
| url | https://doi.org/10.1038/s41467-025-59893-x |
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