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Deep Blue Exciplex Organic Light‐Emitting Diodes with Enhanced Efficiency; P‐type or E‐type Triplet Conversion to Singlet Excitons?
Open accessAbstract
Simple trilayer, deep blue, fluorescent exciplex organic light-emitting diodes (OLEDs) are reported. These OLEDs emit from an exciplex state formed between the highest occupied molecular orbital (HOMO) of N,N'-bis(1-naphthyl)N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) and lowest unoccupied molecular orbital (LUMO) of 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi) and the NPB singlet manifold, yielding 2.7% external quantum efficiency at 450 nm. It is shown that the majority of the delayed emission in electroluminescence arises from P-type triplet fusion at NPB sites not E-type reverse intersystem crossing because of the presence of the NPB triplet state acting as a deep trap.
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Cited by
Wu, T.-L., Huang, M.-J., Lin, C.-C., Huang, P.-Y., Chou, T.-Y., Chen-Cheng, R.-W., Lin, H.-W., Liu, R.-S., & Cheng, C.-H. (2018) · Nature Photonics · doi:10.1038/s41566-018-0112-9 · Cited by 819
Photophysics of thermally activated delayed fluorescence molecules
Dias, F. B., Penfold, T. J., & Monkman, A. P. (2017) · Methods and Applications in Fluorescence · doi:10.1088/2050-6120/aa537e · Cited by 578
Self-citationHighly Efficient Blue Fluorescent OLEDs Based on Upper Level Triplet–Singlet Intersystem Crossing
Xu, Y., Liang, X., Zhou, X., Yuan, P., Zhou, J., Wang, C., Li, B., Hu, D., Qiao, X., Jiang, X., et al. (2019) · Advanced Materials · doi:10.1002/adma.201807388 · Cited by 477
Recent advances in purely organic phosphorescent materials
Mukherjee, S., & Thilagar, P. (2015) · Chemical Communications · doi:10.1039/c5cc03114a · Cited by 474
Exciplex: An Intermolecular Charge-Transfer Approach for TADF
Sarma, M., & Wong, K.-T. (2018) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.7b18318 · Cited by 398
Metadata
- Authors
- Jankus, V., Chiang, C., Dias, F., & Monkman, A. P.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2012-12-27
- Volume
- 25
- Issue
- 10
- Pages
- 1455-1459
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2152816112
- Cited by
- 336
- References
- 0
- FWCI
- 10.58
- Type
- journal article
- Language
- en
- Open access
- green
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- Jankus, V., Chiang, C., Dias, F., & Monkman, A. P. (2013). Deep Blue Exciplex Organic Light‐Emitting Diodes with Enhanced Efficiency; P‐type or E‐type Triplet Conversion to Singlet Excitons? Advanced Materials. https://doi.org/10.1002/adma.201203615
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