The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
High-efficiency and stable short-delayed fluorescence emitters with hybrid long- and short-range charge-transfer excitations
Open accessAbstract
The pursuit of ideal short-delayed thermally activated delayed fluorescence (TADF) emitters is hampered by the mutual exclusion of a small singlet-triplet energy gap (Δ E ST ) and a large oscillator strength ( f ). Here, by attaching an multiresonance-acceptor onto a sterically-uncrowded donor, we report TADF emitters bearing hybrid electronic excitations with a main donor-to-acceptor long-range (LR) and an auxiliary bridge-phenyl short-range (SR) charge-transfer characters, balancing a small Δ E ST and a large f . Moreover, the incorporation of dual equivalent multiresonance-acceptors is found to double the f value without affecting the Δ E ST . A large radiative decay rate over an order of magnitude higher than the intersystem crossing (ISC) rate, and a decent reverse ISC rate of >10 6 s −1 are simultaneously obtained in one emitter, leading to a short delayed-lifetime of ~0.88 μs. The corresponding organic light-emitting diode exhibits a record-high maximum external quantum efficiency of 40.4% with alleviated efficiency roll-off and extended lifetime.
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Cites
Chen, X., Tsuchiya, Y., Ishikawa, Y., Zhong, C., Adachi, C., & Brédas, J. (2017) · Advanced Materials · doi:10.1002/adma.201702767 · Cited by 260 · cited 1×
“Nevertheless, discreetly balancing a proper portion of LR-CT and LE excitations to make a balance of a small Δ E ST and a large f is rather dif fi cult in molecular design and most emitters still face the inevitably enlarged Δ E ST s with only few emitters can reach a compromise 12,13 .”
Cited by
Mamada, M., Hayakawa, M., Ochi, J., & Hatakeyama, T. (2024) · Chemical Society Reviews · doi:10.1039/d3cs00837a · Cited by 482
Wu, X., Ni, S., Wang, C.-H., Zhu, W., & Chou, P.-T. (2025) · Chemical Reviews · doi:10.1021/acs.chemrev.5c00021 · Cited by 325
Metadata
- Authors
- Meng, G., Dai, H., Wang, Q., Zhou, J., Fan, T., Zeng, X., Wang, X., Zhang, Y., Yang, D., Ma, D., Zhang, D., & Duan, L.
- Venue
- Nature Communications
- Published
- 2023-04-26
- Volume
- 14
- Issue
- 1
- Pages
- 2394-2394
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W4367052004
- Cited by
- 169
- References
- 1
- FWCI
- 12.39
- Type
- journal article
- Language
- en
- Open access
- gold
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- Meng, G., Dai, H., Wang, Q., Zhou, J., Fan, T., Zeng, X., Wang, X., Zhang, Y., Yang, D., Ma, D., Zhang, D., & Duan, L. (2023). High-efficiency and stable short-delayed fluorescence emitters with hybrid long- and short-range charge-transfer excitations. Nature Communications. https://doi.org/10.1038/s41467-023-38086-4
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