| Exciplex elimination in an organic light-emitting diode based on a fluorene derivative by inserting 4,4’-N,N’-dicarbazole-biphenyl into donor/acceptor interface |
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| 引用本文： | 张巍,于军胜,黄江,蒋亚东,张清,曹康丽. Exciplex elimination in an organic light-emitting diode based on a fluorene derivative by inserting 4,4’-N,N’-dicarbazole-biphenyl into donor/acceptor interface[J]. 中国物理 B, 2010, 19(4): 47802-047802. DOI: 10.1088/1674-1056/19/4/047802 |
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| 作者姓名： | 张巍 于军胜 黄江 蒋亚东 张清 曹康丽 |
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| 作者单位： | (1)Department of Polymer Science, School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240,China; (2)School of Optoelectronic Information, State Key Laboratory of Electronic Thin Films and Integrated Devices, University ofElectronic Science and Technology of China (UESTC), Chengdu 610054, China |
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| 基金项目： | Project supported by the NationalNatural Science Foundation of China (Grant Nos.~60736005, 60876051and 60425101-1), the Young Talent Project of Sichuan Province of China (GrantNo.~09ZQ026-074), the Natural Science Foundation of Sichuan Province ofChin |
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| 摘 要： | Organic light-emitting diodes (OLEDs) composed of a novelfluorene derivative of2,3-bis(9,9-dihexyl-9H-fluoren-2-yl)-6,7-difluoroquinoxaline (F2Py)were fabricated, and exciplex emission was observed in the device.To depress the exciplex in an OLED for pure colour light emission, 4,4'-N,N'-dicarbazole-biphenyl (CBP) was inserted as a separator at thedonor/acceptor interface. It was found that the device without the CBPlayer emitted a green light peaking at 542~nm from the exciplex and ashoulder peak about 430~nm from F2Py. In contrast, the OLED with CBPlayer emitted only a blue light peak at about 432~nm from F2Py.Device efficiencies were calculated by a simulative mode in aninjection controlled type mechanism, and the results showed thatexciplexes yield much lower quantum efficiency than excitons. Thedevice with CBP has a higher power efficiency as no exciplex waspresent.
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| 关 键 词： | exciplex elimination fluorene derivative organic light-emitting diode 4 4’-N N’dicarbazole-biphenyl |
| 收稿时间： | 2009-07-21 |
Exciplex elimination in an organic light-emitting diode based on a fluorene derivative by inserting 4,4'-N,N'-dicarbazole-biphenyl into donor/acceptor interface |
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| Zhang Wei,Yu Jun-Sheng,Huang Jiang,Jiang Ya-Dong,Zhang Qing and Cao Kang-Li. Exciplex elimination in an organic light-emitting diode based on a fluorene derivative by inserting 4,4'-N,N'-dicarbazole-biphenyl into donor/acceptor interface[J]. Chinese Physics B, 2010, 19(4): 47802-047802. DOI: 10.1088/1674-1056/19/4/047802 |
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| Authors: | Zhang Wei Yu Jun-Sheng Huang Jiang Jiang Ya-Dong Zhang Qing Cao Kang-Li |
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| Affiliation: | School of Optoelectronic Information, State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China; Department of Polymer Science, School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240,China |
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| Abstract: | Organic light-emitting diodes (OLEDs) composed of a novelfluorene derivative of2,3-bis(9,9-dihexyl-9H-fluoren-2-yl)-6,7-difluoroquinoxaline (F2Py)were fabricated, and exciplex emission was observed in the device.To depress the exciplex in an OLED for pure colour light emission, 4,4'-N,N'-dicarbazole-biphenyl (CBP) was inserted as a separator at thedonor/acceptor interface. It was found that the device without the CBPlayer emitted a green light peaking at 542~nm from the exciplex and ashoulder peak about 430~nm from F2Py. In contrast, the OLED with CBPlayer emitted only a blue light peak at about 432~nm from F2Py.Device efficiencies were calculated by a simulative mode in aninjection controlled type mechanism, and the results showed thatexciplexes yield much lower quantum efficiency than excitons. Thedevice with CBP has a higher power efficiency as no exciplex waspresent. |
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| Keywords: | exciplex elimination fluorene derivative organiclight-emitting diode 4 4'-N N'-dicarbazole-biphenyl |
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