| High efficient light-emitting diodes using polystyrene as matrix |
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| 引用本文： | HEGufeng LIUJie YANGYang LIYongfang. High efficient light-emitting diodes using polystyrene as matrix[J]. 科学通报(英文版), 2003, 48(9): 853-855. DOI: 10.1007/BF03325662 |
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| 作者姓名： | HEGufeng LIUJie YANGYang LIYongfang |
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| 作者单位： | [1]CenterforMolecularScience,InstituteofChemistry,ChineseAcademyofSciences,Beijing100080,China [2]DepartmentofMaterialsScienceandEngineering,UniversityofCaliforniaatLosAngeles,LosAngeles,CA90095,USA |
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| 基金项目： | 国家自然科学基金，美国国家科学基金 |
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| 摘 要： | High efficient polymer light-emitting diodes (PLEDs) were obtained by using a blend of conjugated polymer G-PF, a copolymer of fluorene and thiophene, and polystyrene (PS). The maximum electroluminescent (EL) efficiency of the device is 12 cd/A when G-PF/PS weight ratio is at 80/20, while that of pure G-PF device is 6.5 cd/A. Studies on photoluminescence and electroluminescence of the blends indicate that inter-chain interactions were tremendously suppressed due to the dilution effect. However, after PS concentration exceeds 20% the EL efficiency of the devices decreases with further increase of PS concentration. This may be due to the decrease of the recombination probability of electrons and holes with the excessive addition of PS insulator.
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| 关 键 词： | 高效率聚合体 发光二极管 聚苯乙烯 光致发光 电致发光 |
| 收稿时间： | 2002-07-19 |
High efficient light-emitting diodes using polystyrene as matrix |
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| Gufeng He,Jie Liu,Yang Yang,Yongfang Li. High efficient light-emitting diodes using polystyrene as matrix[J]. Chinese science bulletin, 2003, 48(9): 853-855. DOI: 10.1007/BF03325662 |
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| Authors: | Gufeng He Jie Liu Yang Yang Yongfang Li |
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| Affiliation: | e-mail: liyf@ iccas.ac.cn |
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| Abstract: | High efficient polymer light-emitting diodes (PLEDs) were obtained by using a blend of conjugated polymer G-PF, a copolymer of fluorene and thiophene, and polystyrene (PS). The maximum electroluminescent (EL) efficiency of the device is 12 cd/A when G-PF/PS weight ratio is at 80/20, while that of pure G-PF device is 6.5 cd/A. Studies on photoluminescence and electroluminescence of the blends indicate that inter-chain interactions were tremendously suppressed due to the dilution effect. However, after PS concentration exceeds 20% the EL efficiency of the devices decreases with further increase of PS concentration. This may be due to the decrease of the recombination probability of electrons and holes with the excessive addition of PS insulator. |
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| Keywords: | polymer light-emitting diodes quantum efficiency polystyrene photoluminescence electroluminescence.DOI: 10.1360/02wb0027 |
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