Projects per year
Abstract
The development of narrowband emissive, bright, and stable solution-processed organic light-emitting diodes (SP-OLEDs) remains a challenge. Here, a strategy is presented that merges within a single emitter a TADF sensitizer responsible for exciton harvesting and an MR-TADF motif that provides bright and narrowband emission. This emitter design also shows strong resistance to aggregate formation and aggregation-cause quenching. It is based on a known MR-TADF emitter DtBuCzB with a donor-acceptor TADF moiety consisting of either tert-butylcarbazole donors (tBuCzCO2HDCzB) or second-generation carbazole-based donor dendrons (2GtBuCzCO2HDCzB) and a benzoate acceptor. The TADF moiety acts as an exciton harvesting antenna and transfers these excitons via Förster resonance energy transfer to the MR-TADF emissive core. The SP-OLEDs with 2GtBuCzCO2HDCzB and tBuCzCO2HDCzB thus show very high maximum external quantum efficiencies (EQEmax of 27.9 and 22.0%) and minimal efficiency roll-off out to 5000 cd m−2.
Original language | English |
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Article number | 2415289 |
Number of pages | 12 |
Journal | Advanced Materials |
Volume | Early View |
Early online date | 9 Jan 2025 |
DOIs | |
Publication status | E-pub ahead of print - 9 Jan 2025 |
Keywords
- Dendrimer
- Energy transfer
- Multiresonant thermally activated delayed fluorescence
- Solution-processed organic light-emitting diodes
Fingerprint
Dive into the research topics of 'A multiresonant thermally activated delayed fluorescent dendrimer with intramolecular energy transfer: application for efficient host-free green solution-processed organic light-emitting diodes'. Together they form a unique fingerprint.-
Allan Watson Programme Grant: Boron: Beyond the Reagent
Watson, A. J. B. (PI), Morris, R. E. (CoI), Smith, A. D. (CoI) & Zysman-Colman, E. (CoI)
1/05/23 → 30/04/28
Project: Standard
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MR TADF: Multi-resonance TADF materials for highly efficient and stable OLEDs
Zysman-Colman, E. (PI)
1/07/22 → 30/06/25
Project: Standard
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SolOLED: Scale-up of TADF Dendrimer: SolOLED: Scale-up of TADF Dendrimer Emitters for Solution-Processed OLEDs
Zysman-Colman, E. (PI)
1/11/21 → 30/06/22
Project: Standard
Datasets
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A Multiresonant Thermally Activated Delayed Fluorescent Dendrimer with Intramolecular Energy Transfer: Application for Efficient Host-Free Green Solution-Processed Organic Light-emitting Diodes (dataset)
Wu, S. (Creator), Chen, D. (Creator), Zhang, X.-H. (Creator), Sun, D. (Creator) & Zysman-Colman, E. (Creator), University of St Andrews, 9 Jan 2025
DOI: 10.17630/625c42fc-7aa3-44f5-9a9a-7cd6fffe54f0
Dataset
File