| Autor: |
Hsin-Fei Meng, Hung Min Shih, Chun Yao Chen, Kuang Hui Hsu, Chain-Shu Hsu, Sheng Chia Lin, Yu Chiang Chao, Yung Ming Liao |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Polymer. 52:3717-3724 |
| ISSN: |
0032-3861 |
| Popis: |
A new series of super high brightness and luminance efficient poly(2,3-diphenyl-1,4-phenylene vinylene) (DP-PPV)-based electroluminescent (EL) polymers containing methoxy or long branched alkoxy chains were synthesized via Gilch polymerization. The branched alkoxy groups were introduced to enhance solubility for blade and spin-coating processes. Monomers of DMeO-PPV and m-Ph-PPV were used to increase steric hindrance and prevent close packing of the main chain. By controlling the feeding ratio of different monomers during polymerization, DP-PPV derivatives with high molecular weight were obtained. All synthesized polymers possess high glass transition temperatures and thermal stabilities. The maximum photoluminescent emissions of the thin films are located between 544 and 547 nm. Cyclic voltammetry analysis reveals that the band gaps of these light-emitting materials are in the range of 2.75 e2.84 eV. Blade coating was used to fabricate multilayer polymer light-emitting diodes. A multilayer electroluminescent device with the configuration of ITO/PEDOT:PSS/TFB/P1/TPBi/LiF/Al exhibited a very high luminescence efficiency (10.96 cd A �1 ). The maximum brightness of the multilayer EL device ITO/ |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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