| Realization of Red-Organic-Light Emitting Diode by Introducing the Double Emitting Zone |
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| 作者姓名： | 姜文龙 侯晶莹 赵毅 刘式墉 |
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| 作者单位： | [1]ElectronicInformationandEngineeringDepartment,JilinNormaluniversity,Siping136000 [2]NationalLaboratoryofIntegratedOptoelectronics,JilinUniversity,Changchun130023 |
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| 摘 要： | A saturated red-organic-light emitting diode (OLED) has been realized by doping an emitting material both in the hole-transporting layer (HTL) and the electron-transporting layer (ETL) to form double emitting zone. The red dopant, 4-(Dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), was doped into the N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) layer and the tris (8-quinolinolate) aluminium (Alq3) layer, both of which act as the emitting layers. The optimal device, with a structure of ITO/CuPc/NPB/NPB:DCJTB/Alq3:DCJTB/Alq3/LiF/Al, showed good chromaticity coordinates (x = 0.63,y = 0.36) at 8 V. Uniquely, the current efficiency of the device was relatively independent of the drive voltage in a wide range from 8 V to 20 V. That may be helpful to ameliorate the lifetime of the organic electrol,Jmlnescent devices and to adjust the grey-scale for the future full-colour display panel.
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| 关 键 词： | 有机发光二极管 OLED 双重发光区域 HTL 发光材料 空穴传输层 电子传输层 ETL |
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