Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes
Abstract Carbon quantum dots are emerging as promising nanomaterials for next-generation displays. The elaborate structural design is crucial for achieving thermally activated delayed fluorescence, particularly for improving external quantum efficiency of electroluminescent light-emitting diodes. He...
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-04-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-47372-8 |
| _version_ | 1797209206060744704 |
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| author | Yuxin Shi Yang Zhang Zhibin Wang Ting Yuan Ting Meng Yunchao Li Xiaohong Li Fanglong Yuan Zhan’ao Tan Louzhen Fan |
| author_facet | Yuxin Shi Yang Zhang Zhibin Wang Ting Yuan Ting Meng Yunchao Li Xiaohong Li Fanglong Yuan Zhan’ao Tan Louzhen Fan |
| author_sort | Yuxin Shi |
| collection | DOAJ |
| description | Abstract Carbon quantum dots are emerging as promising nanomaterials for next-generation displays. The elaborate structural design is crucial for achieving thermally activated delayed fluorescence, particularly for improving external quantum efficiency of electroluminescent light-emitting diodes. Here, we report the synthesis of onion-like multicolor thermally activated delayed fluorescence carbon quantum dots with quantum yields of 42.3–61.0%. Structural, spectroscopic characterization and computational studies reveal that onion-like structures assembled from monomer carbon quantum dots of different sizes account for the decreased singlet-triplet energy gap, thereby achieving efficient multicolor thermally activated delayed fluorescence. The devices exhibit maximum luminances of 3785–7550 cd m−2 and maximum external quantum efficiency of 6.0–9.9%. Importantly, owing to the weak van der Waals interactions and adequate solution processability, flexible devices with a maximum luminance of 2554 cd m−2 are realized. These findings facilitate the development of high-performance carbon quantum dots-based electroluminescent light-emitting diodes that are promising for practical applications. |
| first_indexed | 2024-04-24T09:51:01Z |
| format | Article |
| id | doaj.art-5b4dda2110144d7587a3020ec2481c23 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-24T09:51:01Z |
| publishDate | 2024-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-5b4dda2110144d7587a3020ec2481c232024-04-14T11:20:51ZengNature PortfolioNature Communications2041-17232024-04-0115111110.1038/s41467-024-47372-8Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodesYuxin Shi0Yang Zhang1Zhibin Wang2Ting Yuan3Ting Meng4Yunchao Li5Xiaohong Li6Fanglong Yuan7Zhan’ao Tan8Louzhen Fan9Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityCollege of Physics and Energy, Fujian Normal UniversityKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityBeijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing University of Chemical TechnologyKey Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal UniversityAbstract Carbon quantum dots are emerging as promising nanomaterials for next-generation displays. The elaborate structural design is crucial for achieving thermally activated delayed fluorescence, particularly for improving external quantum efficiency of electroluminescent light-emitting diodes. Here, we report the synthesis of onion-like multicolor thermally activated delayed fluorescence carbon quantum dots with quantum yields of 42.3–61.0%. Structural, spectroscopic characterization and computational studies reveal that onion-like structures assembled from monomer carbon quantum dots of different sizes account for the decreased singlet-triplet energy gap, thereby achieving efficient multicolor thermally activated delayed fluorescence. The devices exhibit maximum luminances of 3785–7550 cd m−2 and maximum external quantum efficiency of 6.0–9.9%. Importantly, owing to the weak van der Waals interactions and adequate solution processability, flexible devices with a maximum luminance of 2554 cd m−2 are realized. These findings facilitate the development of high-performance carbon quantum dots-based electroluminescent light-emitting diodes that are promising for practical applications.https://doi.org/10.1038/s41467-024-47372-8 |
| spellingShingle | Yuxin Shi Yang Zhang Zhibin Wang Ting Yuan Ting Meng Yunchao Li Xiaohong Li Fanglong Yuan Zhan’ao Tan Louzhen Fan Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes Nature Communications |
| title | Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes |
| title_full | Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes |
| title_fullStr | Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes |
| title_full_unstemmed | Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes |
| title_short | Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes |
| title_sort | onion like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light emitting diodes |
| url | https://doi.org/10.1038/s41467-024-47372-8 |
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