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High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor–acceptor hybrid molecules
Abstract
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 (ΔEST = 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.
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Cited by
Recent advances in organic thermally activated delayed fluorescence materials
Yang, Z., Mao, Z., Xie, Z., Zhang, Y., Liu, S., Zhao, J., Xu, J., Chi, Z., & Aldred, M. P. (2017) · Chemical Society Reviews · doi:10.1039/c6cs00368k · Cited by 2,395
Samanta, P. K., Kim, D., Coropceanu, V., & Brédas, J.-L. (2017) · Journal of the American Chemical Society · doi:10.1021/jacs.6b12124 · Cited by 1,025
Hosokai, T., Matsuzaki, H., Nakanotani, H., Tokumaru, K., Tsutsui, T., Furube, A., Nasu, K., Nomura, H., Yahiro, M., & Adachi, C. (2017) · Science Advances · doi:10.1126/sciadv.1603282 · Cited by 365
Self-citationLee, D. R., Kim, M., Jeon, S. K., Hwang, S., Lee, C. W., & Lee, J. Y. (2015) · Advanced Materials · doi:10.1002/adma.201502053 · Cited by 306
Li, J., Jiang, Y., Cheng, J., Zhang, Y., Su, H., Lam, J. W. Y., Sung, H. H. Y., Wong, K. S., Kwok, H. S., & Tang, B. Z. (2015) · Physical Chemistry Chemical Physics · doi:10.1039/c4cp04052j · Cited by 80
Metadata
- Authors
- Youn Lee, S., Yasuda, T., Nomura, H., & Adachi, C.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2012-08-27
- Volume
- 101
- Issue
- 9
- Pages
- 093306
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2019742728
- Cited by
- 365
- References
- 0
- FWCI
- 20.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- Youn Lee, S., Yasuda, T., Nomura, H., & Adachi, C. (2012). High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor–acceptor hybrid molecules. Applied Physics Letters. https://doi.org/10.1063/1.4749285
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