Solution-processed diarylfluorene derivatives for violet-blue amplified spontaneous emission and electroluminescence
Autor: | Zongyan Zuo, Jianpu Wang, Lubing Bai, Jianfeng Zhao, Chengrong Yin, Wei Huang, Yamin Han, Jiewei Li, Yu-Yu Liu, Bin Liu, Linghai Xie, Jinyi Lin, Wen-Sai Zhu, Meng-Na Yu, Changjin Ou, Xinwen Zhang |
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Rok vydání: | 2017 |
Předmět: |
chemistry.chemical_classification
Amplified spontaneous emission Materials science business.industry Carbazole 02 engineering and technology General Chemistry Polymer Conjugated system Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Fluorescence 0104 chemical sciences Amorphous solid chemistry.chemical_compound chemistry Materials Chemistry OLED Optoelectronics 0210 nano-technology business |
Zdroj: | Journal of Materials Chemistry C. 5:9903-9910 |
ISSN: | 2050-7534 2050-7526 |
DOI: | 10.1039/c7tc03536e |
Popis: | A series of solution-processable diarylfluorene-based materials with pendent 4-(hexyloxy carbazole)-9,9-diphenyl-9H-fluorene (MC6Cz) or 4-(octyloxy)-9,9-diphenyl-9H-fluorene (MC8) as the core and endcapped with different charge transport moieties such as phenylcarbazole (NPC) or triphenylemine (TPA) have been synthesized and investigated systemically. These materials exhibited bright fluorescence emission from violet-blue to deep blue without molecular aggregation in diluted solutions and films. Furthermore, these materials also displayed prominent virtues including superior solution-processability and amorphous characteristics. Consequently, the EL spectra of the solution-processed organic light-emitting diodes (OLEDs) are expected to be similar to the corresponding PL spectra, suggesting intramolecular photophysical behavior. MC6Cz-9-NPC as an emitting layer presented the highest maximum luminance of about 1560 cd m−2 with a lower turn on voltage of 3.5 V. In contrast, the ASE results revealed that the MC8 core-containing compounds exhibited relatively lower thresholds comparable with traditional conjugated or star type polymers, which could be promising optical gain media. We proposed a novel molecular design strategy to construct high-performance solution-processed violet-blue fluorophores. |
Databáze: | OpenAIRE |
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