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Reduction of Concentration Quenching in a Nondoped DCM Organic Light-Emitting Diode |
| LIU Zhen-Gang;CHEN Zhi-Jian;GONG Qi-Huang |
| Department of Physics & State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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LIU Zhen-Gang, CHEN Zhi-Jian, GONG Qi-Huang 2005 Chin. Phys. Lett. 22 1536-1539 |
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Abstract We obtain a nondoped red organic light-emitting diode (OLED) structure ITO/pc-PPV (～30nm)DCM (～30nm) /BCP (～30nm)Mg:Ag, where DCM refers to 4-(dicyanomethylene)-2-methyl-6-[(4-dimethylaninostyryl)-4-H-pyran]. The OLED shows pure and stable red luminescence depending on the driving voltages. The maximum luminance is 330Cd/m2 and the turn-on voltage is as low as ～2V. The reason why the concentration quenching of DCM could be reduced in this structure is investigated. In the preparation process, both the hole-transporting layer and the emitter layer are formed by the spin-coated method. It is believed that this method can lead to a new way to avoid the concentration quenching of red-emitting materials.
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| Keywords:
85.60.Jb
85.60.Bt
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Published: 01 June 2005
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| PACS: |
85.60.Jb
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(Light-emitting devices)
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85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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