The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Triplet Harvesting with 100% Efficiency by Way of Thermally Activated Delayed Fluorescence in Charge Transfer OLED Emitters
Open accessAbstract
Organic light‐emitting diodes (OLEDs) have their performance limited by the number of emissive singlet states created upon charge recombination (25%). Recently, a novel strategy has been proposed, based on thermally activated up‐conversion of triplet to singlet states, yielding delayed fluorescence (TADF), which greatly enhances electroluminescence. The energy barrier for this reverse intersystem crossing mechanism is proportional to the exchange energy (Δ EST) between the singlet and triplet states; therefore, materials with intramolecular charge transfer (ICT) states, where it is known that the exchange energy is small, are perfect candidates. However, here it is shown that triplet states can be harvested with 100% efficiency via TADF, even in materials with Δ EST of more than 20 kT (where k is the Boltzmann constant and T is the temperature) at room temperature. The key role played by lone pair electrons in achieving this high efficiency in a series of ICT molecules is elucidated. The results show the complex photophysics of efficient TADF materials and give clear guidelines for designing new emitters.
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Citations
Cites
The Triplet State and Molecular Electronic Processes in Organic Molecules
Lower, S. K., & El-Sayed, M. A. (1966) · Chemical Reviews · doi:10.1021/cr60240a004 · Cited by 1,146
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
All-organic thermally activated delayed fluorescence materials for organic light-emitting diodes
Liu, Y., Li, C., Ren, Z., Yan, S., & Bryce, M. R. (2018) · Nature Reviews Materials · doi:10.1038/natrevmats.2018.20 · Cited by 1,644
Self-citationGómez-Bombarelli, R., Aguilera-Iparraguirre, J., Hirzel, T. D., Duvenaud, D., Maclaurin, D., Blood-Forsythe, M. A., Chae, H. S., Einzinger, M., Ha, D.-G., Wu, T., et al. (2016) · Nature Materials · doi:10.1038/nmat4717 · Cited by 1,060
Zhang, D., Duan, L., Li, C., Li, Y., Li, H., Zhang, D., & Qiu, Y. (2014) · Advanced Materials · doi:10.1002/adma.201401476 · Cited by 668
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
Metadata
- Authors
- Dias, F. B., Bourdakos, K. N., Jankus, V., Moss, K. C., Kamtekar, K. T., Bhalla, V., Santos, J., Bryce, M. R., & Monkman, A. P.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2013-05-24
- Volume
- 25
- Issue
- 27
- Pages
- 3707-3714
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2061148175
- Cited by
- 1,003
- References
- 1
- FWCI
- 43.74
- Type
- journal article
- Language
- en
- Open access
- green
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- The paper
- Dias, F. B., Bourdakos, K. N., Jankus, V., Moss, K. C., Kamtekar, K. T., Bhalla, V., Santos, J., Bryce, M. R., & Monkman, A. P. (2013). Triplet Harvesting with 100% Efficiency by Way of Thermally Activated Delayed Fluorescence in Charge Transfer OLED Emitters. Advanced Materials. https://doi.org/10.1002/adma.201300753
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