Aggregation-Induced Delayed Fluorescence Based on Donor/Acceptor-Tethered Janus Carborane Triads: Unique Photophysical Properties of Nondoped OLEDs
| Autor: | Ryuhei Furue, Takuma Yasuda, In Seob Park, Takuro Nishimoto, Jiyoung Lee |
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| Rok vydání: | 2016 |
| Předmět: |
Photoluminescence
Chemistry Nanotechnology General Medicine 02 engineering and technology General Chemistry Conjugated system Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Fluorescence Catalysis 0104 chemical sciences OLED Carborane Janus 0210 nano-technology Luminescence |
| Zdroj: | Angewandte Chemie International Edition. 55:7171-7175 |
| ISSN: | 1433-7851 |
| Popis: | Luminescent materials consisting of boron clusters, such as carboranes, have attracted immense interest in recent years. In this study, luminescent organic-inorganic conjugated systems based on o-carboranes directly bonded to electron-donating and electron-accepting π-conjugated units were elaborated as novel optoelectronic materials. These o-carborane derivatives simultaneously possessed aggregation-induced emission (AIE) and thermally activated delayed fluorescence (TADF) capabilities, and showed strong yellow-to-red emissions with high photoluminescence quantum efficiencies of up to 97 % in their aggregated states or in solid neat films. Organic light-emitting diodes utilizing these o-carborane derivatives as a nondoped emission layer exhibited maximum external electroluminescence quantum efficiencies as high as 11 %, originating from TADF. |
| Databáze: | OpenAIRE |
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