Molecular design of sensitizer to suppress efficiency loss mechanism in hyper-fluorescent organic light-emitting diodes
| Autor: | Hye Won Choi, Si Hyun Han, Kyoung Soo Yook, Jun Yeob Lee, Ji Seon Jang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Carbazole Doping 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Fluorescence 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound chemistry Materials Chemistry OLED Molecule Optoelectronics Electrical and Electronic Engineering 0210 nano-technology business Common emitter Diode |
| Zdroj: | Organic Electronics. 59:236-242 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2018.05.015 |
| Popis: | Efficiency loss mechanism of hyper-fluorescent organic light-emitting diodes was studied by comparing two sensitizers with different molecular structures and a design strategy of the sensitizer was suggested. Examination of two sensitizers with a 3,6-dimethylcarbazole or 3,6-di (tert-butyl)carbazole donor proposed that the 3,6-dimethylcarbazole donor could not suppress efficiency loss by fluorescent emitter doping, but the 3,6-di(tert-butyl)carbazole donor effectively suppressed the efficiency loss. There was little decrease of the efficiency of the hyper-fluorescent device built on the 3,6-di(tert-butyl)carbazole based TADF sensitizer according to fluorescent emitter doping concentration. It was proven from this work that the tert-butyl carbazole modified TADF molecules are effective as the sensitizers of the hyper-fluorescent devices. |
| Databáze: | OpenAIRE |
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