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Revealing the spin–vibronic coupling mechanism of thermally activated delayed fluorescence
Open accessAbstract
Knowing the underlying photophysics of thermally activated delayed fluorescence (TADF) allows proper design of high efficiency organic light-emitting diodes. We have proposed a model to describe reverse intersystem crossing (rISC) in donor–acceptor charge transfer molecules, where spin–orbit coupling between singlet and triplet states is mediated by one of the local triplet states of the donor (or acceptor). This second order, vibronically coupled mechanism describes the basic photophysics of TADF. Through a series of measurements, whereby the energy ordering of the charge transfer (CT) excited states and the local triplet are tuned in and out of resonance, we show that TADF reaches a maximum at the resonance point, substantiating our model of rISC. Moreover, using photoinduced absorption, we show how the populations of both singlet and triplet CT states and the local triplet state change in and out of resonance. Our vibronic coupling rISC model is used to predict this behaviour and describes how rISC and TADF are affected by external perturbation.
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Cited by
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Zhao, W., He, Z., & Tang, B. Z. (2020) · Nature Reviews Materials · doi:10.1038/s41578-020-0223-z · Cited by 1,766
Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter
Kondo, Y., Yoshiura, K., Kitera, S., Nishi, H., Oda, S., Gotoh, H., Sasada, Y., Yanai, M., & Hatakeyama, T. (2019) · Nature Photonics · doi:10.1038/s41566-019-0476-5 · Cited by 1,545
Liang, X., Yan, Z., Han, H., Wu, Z., Zheng, Y., Meng, H., Zuo, J., & Huang, W. (2018) · Angewandte Chemie International Edition · doi:10.1002/anie.201806323 · Cited by 426
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
Self-citationChen, X., Tsuchiya, Y., Ishikawa, Y., Zhong, C., Adachi, C., & Brédas, J. (2017) · Advanced Materials · doi:10.1002/adma.201702767 · Cited by 260
Metadata
- Authors
- Etherington, M. K., Gibson, J., Higginbotham, H. F., Penfold, T. J., & Monkman, A. P.
- Venue
- Nature Communications
- Published
- 2016-11-30
- Volume
- 7
- Issue
- 1
- Pages
- 13680-13680
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2558124715
- Cited by
- 1,012
- References
- 0
- FWCI
- 28.05
- Type
- journal article
- Language
- en
- Open access
- gold
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- Etherington, M. K., Gibson, J., Higginbotham, H. F., Penfold, T. J., & Monkman, A. P. (2016). Revealing the spin–vibronic coupling mechanism of thermally activated delayed fluorescence. Nature Communications. https://doi.org/10.1038/ncomms13680
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