Highly Efficient Blue Fluorescent OLEDs Based on Upper Level Triplet–Singlet Intersystem Crossing
South China University of Technology · Chinese Academy of Sciences · +3 more institutions
Abstract
Abstract Purely organic electroluminescent materials, such as thermally activated delayed fluorescent (TADF) and triplet–triplet annihilation (TTA) materials, basically harness triplet excitons from the lowest triplet excited state (T 1 ) to realize high efficiency. Here, a fluorescent material that can convert triplet excitons into singlet excitons from the high‐lying excited state (T 2 ), referred to here as a “hot exciton” path, is reported. The energy levels of this compound are determined from the sensitization and nanosecond transient absorption spectroscopy measurements, i.e., small splitting energy between S 1 and T 2 and rather large T 2 –T 1 energy gap, which are expected to impede the internal…
Citation impact
- FWCI
- 25.91
- Percentile
- 100%
- References
- 51
Authors
14- YXYuwei Xu
South China University of Technology
- XLXiaoming Liang
South China University of Technology
- XZXuehong Zhou
South China University of Technology
- PYPeisen Yuan
Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, State Key Laboratory of Polymer Physics and Chemistry, South China University of Technology
- JZJiadong Zhou
South China University of Technology
Topics & keywords
- Intersystem crossing
- Materials science
- OLED
- Fluorescence
- Singlet state
- Photochemistry
- Optoelectronics
- Nanotechnology
- Affordable and clean energy