Design approach of exciplexes enhancing the singlet and triplet energy by managing electron transport type host
| Autor: | Sang Kyu Jeon, Ha Lim Lee, Wook Song, Jun Yeob Lee, Ji Gwang Yu |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Excimer 01 natural sciences Electron transport chain 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials Chemical physics Physics::Atomic and Molecular Clusters Materials Chemistry Quantum efficiency Astrophysics::Earth and Planetary Astrophysics Singlet state Electrical and Electronic Engineering 0210 nano-technology Phosphorescence Host (network) HOMO/LUMO Energy (signal processing) |
| Zdroj: | Organic Electronics. 65:121-126 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2018.11.010 |
| Popis: | A high singlet energy and triplet energy exciplex host was developed by synthesizing an electron transport type host with a controlled lowest unoccupied molecular orbital (LUMO) level and intermolecular interaction. A diphenyltriazine derived host was designed by substituting t-butyl functional moieties to the electron transporting core structure to make the LUMO shallow for high exciplex emission energy. An exciplex host with a singlet energy of 3.49 eV and a triplet energy of 3.02 eV was derived by mixing the t-butyl modified diphenyltriazine type host with a hole transport type host. The comparison of the newly developed t-butyl modified host with a previous host without the t-butyl group clarified that the t-butyl group had a singlet and triplet energy boosting effect. A high external quantum efficiency of 17.3% was demonstrated in the blue phosphorescent device using the high triplet energy exciplex host. |
| Databáze: | OpenAIRE |
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