| Polymer White-Light-Emitting Diodes with High Work Function Cathode Based on a Novel Phosphorescent Chelating Copolymer |
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| 引用本文： | 熊艳 张勇 周建林 彭俊彪 黄文波 曹镛. Polymer White-Light-Emitting Diodes with High Work Function Cathode Based on a Novel Phosphorescent Chelating Copolymer[J]. 中国物理快报, 2007, 24(12): 3547-3550 |
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| 作者姓名： | 熊艳 张勇 周建林 彭俊彪 黄文波 曹镛 |
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| 作者单位： | Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Special Functional Materials of Ministry of Education, South China University of Technology, Guangzhou 510640 |
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| 基金项目： | Supported by the National Basic Research Program of China under Grant No 2002CB613405, the National Natural Science Foundation of China under Grant Nos 50573024 and 50433030, and the Key Project of the Ministry of Education of China under Grant No 104208. |
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| 摘 要： | Polymer white-light-emitting diodes are fabricated based on the blend of poly[9,9-di-（2-ethylhexyl）-fluorenyl-2, 7- diyl]-end capped with polysilsesquioxane （PFO） and a chelating copolymer of poly[（9,9-bis（3′-（N,N-dimethylamino） propyl）-2, 7-fluorene-alt-2, 7-（9,9-dioctylfluorene） ）-co- [2, 7-（9,9-dioctlyfluorene）-alt-5,5-bis（2-（4-methyl-l-naphtha- lene） pyridine-C^2,N） iridium （III） acethylacetonate]] （PFN-NaIr）. The device with the sole aluminium cathode is able to produce a comparably white electroluminescence efficiency of 1.31 cd/A to that of the device using low work function cathodes （such as Ba, Ca, etc.）. The CIE coordinates of the white light emission consisting of red, green and blue three components are nearly at （0.34, 0.35）. The mechanism of the white light emission from the device with the AI cathode is investigated, which is related to the efficient injection of electrons through the interface of PFN-Nalr/AI.
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| 关 键 词： | 发光二极管 聚合物 阴极 磷光性 |
| 收稿时间： | 2007-07-09 |
Polymer White-Light-Emitting Diodes with High Work Function Cathode Based on a Novel Phosphorescent Chelating Copolymer |
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| XIONG Yan,ZHANG Yong,ZHOU Jian-Lin,PENG Jun-Biao,HUANG Wen-Bo,CAO Yong. Polymer White-Light-Emitting Diodes with High Work Function Cathode Based on a Novel Phosphorescent Chelating Copolymer[J]. Chinese Physics Letters, 2007, 24(12): 3547-3550 |
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| Authors: | XIONG Yan ZHANG Yong ZHOU Jian-Lin PENG Jun-Biao HUANG Wen-Bo CAO Yong |
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| Affiliation: | Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Special Functional Materials of Ministry of Education, South China University of Technology, Guangzhou 510640 |
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| Abstract: | Polymer white-light-emitting diodes are fabricated based on the blend of poly[9,9-di-(2-% ethylhexyl)-fluorenyl-2,7-diyl]-end capped with polysilsesquioxane (PFO) and a chelating copolymer of poly[(9,9-bis(3'-(N,N-dimethylamino) propyl)-2,7-fluorene-alt-2,7-(9,9-dioctylfluorene))-co- [2,7-(9,9-dioctlyfluorene)-alt-5,5-bis(2-(4-methyl-1-naphtha-lene) pyridine-C2,N)iridium (III) acethylacetonate]] (PFN-NaIr). The device with the sole aluminium cathode is able to produce a comparably white electroluminescence efficiency of 1.31cd/A to that of the device using low work function cathodes (such as Ba, Ca, etc.). The CIE coordinates of the white light emission consisting of red, green and blue three components are nearly at (0.34, 0.35). The mechanism of the white light emission from the device with the Al cathode is investigated, which is related to the efficient injection of electrons through the interface of PFN-NaIr/Al. |
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| Keywords: | 78.60.Fi 78.66.Qn 85.60.Jb |
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