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Oxadiazole- and triazole-based highly-efficient thermally activated delayed fluorescence emitters for organic light-emitting diodes
Abstract
We developed highly-efficient thermally activated delayed fluorescence (TADF) emitters containing 2,5-diphenyl-1,3,4-oxadiazole (OXD) or 3,4,5-triphenyl-4H-1,2,4-triazole (TAZ) electron acceptor and phenoxazine (PXZ) electron donor moieties. Oxadiazole-based compounds PXZ-OXD and 2PXZ-OXD showed green emission, while the triazole-based ones PXZ-TAZ and 2PXZ-TAZ exhibited sky-blue emission. In toluene solution, the donor–acceptor–donor-type molecules 2PXZ-OXD and 2PXZ-TAZ showed more efficient TADF and higher photoluminescence quantum yields (PLQYs) than the donor–acceptor-type molecules PXZ-OXD and PXZ-TAZ. When doped into a host material, 2PXZ-OXD displayed a high PLQY of 87%. An organic light-emitting diode using 2PXZ-OXD as an emitter exhibited an external quantum efficiency (EQE) of 14.9%, which exceeds those obtained with conventional fluorescent emitters. This high EQE results from the efficient generation of TADF in 2PXZ-OXD.
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Electron Transport Materials for Organic Light-Emitting Diodes
Kulkarni, A. P., Tonzola, C. J., Babel, A., & Jenekhe, S. A. (2004) · Chemistry of Materials · doi:10.1021/cm049473l · Cited by 1,624
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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
Data, P., Pander, P., Okazaki, M., Takeda, Y., Minakata, S., & Monkman, A. P. (2016) · Angewandte Chemie International Edition · doi:10.1002/anie.201600113 · Cited by 363
The theory of thermally activated delayed fluorescence for organic light emitting diodes
Penfold, T. J., Dias, F. B., & Monkman, A. P. (2018) · Chemical Communications · doi:10.1039/c7cc09612g · Cited by 341
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Kim, J. H., Yun, J. H., & Lee, J. Y. (2018) · Advanced Optical Materials · doi:10.1002/adom.201800255 · Cited by 314
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Metadata
- Authors
- Lee, J., Shizu, K., Tanaka, H., Nomura, H., Yasuda, T., & Adachi, C.
- Venue
- Journal of Materials Chemistry C
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2013
- Volume
- 1
- Issue
- 30
- Pages
- 4599
- ISSN
- 2050-7526 (ISSN-L)
- 2050-7534
- OpenAlex
- W2068503684
- Cited by
- 328
- References
- 2
- FWCI
- 20.57
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lee, J., Shizu, K., Tanaka, H., Nomura, H., Yasuda, T., & Adachi, C. (2013). Oxadiazole- and triazole-based highly-efficient thermally activated delayed fluorescence emitters for organic light-emitting diodes. Journal of Materials Chemistry C. https://doi.org/10.1039/c3tc30699b
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