High-Efficiency Deep-Blue Light-Emitting Diodes Based on Phenylquinoline/Carbazole-Based Compounds
| Autor: | Sung-Ho Jin, Jin Su Park, Seungjoon Lee, Jin Yong Lee, Jae-Wook Kang, Hyung-Dol Park, Yeong-Soon Gal, Kyung-Jin Yoon, Sung Kwon Kang, Sunwoo Kang, Se-Hyung Lee, Jang-Joo Kim, Young-Inn Kim |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Dopant business.industry Carbazole Electroluminescence Condensed Matter Physics Electronic Optical and Magnetic Materials Amorphous solid law.invention Biomaterials chemistry.chemical_compound chemistry law Electrochemistry OLED Optoelectronics Quantum efficiency business Light-emitting diode Diode |
| Zdroj: | Advanced Functional Materials. 18:3922-3930 |
| ISSN: | 1616-3028 1616-301X |
| DOI: | 10.1002/adfm.200800697 |
| Popis: | Highly efficient deep-blue fluorescent materials based on phenylquinoline–carbazole derivatives (PhQ-CVz, MeO-PhQ-CVz, and CN-PhQ-CVz) are synthesized for organic light-emitting diodes (OLEDs). The materials form high-quality amorphous thin films by thermal evaporation and the energy levels can be easily adjusted by the introduction of different electron-donating and electron-withdrawing groups on carbazoylphenylquinoline. Non-doped deep-blue OLEDs that use PhQ-CVz as the emitter show bright emission (Commission Internationale de L'Eclairage (CIE) coordinates, x = 0.156, y = 0.093) with an external quantum efficiency of 2.45%. Furthermore, the material works as an excellent host material for 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl dopant to get high-performance OLEDs with excellent deep-blue CIE coordinates (x = 0.155, y = 0.157), high power efficiency (5.98 lm W−1), and high external quantum efficiency (5.22%). |
| Databáze: | OpenAIRE |
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