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基于红色荧光染料3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene的高性能白色有机电致发光器件

文雯 王博 李璐 于军胜 蒋亚东

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基于红色荧光染料3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene的高性能白色有机电致发光器件

文雯, 王博, 李璐, 于军胜, 蒋亚东

High performance white organic light-emitting devices based on a novel red fluorescent dye 3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene

Wen Wen, Wang Bo, Li Lu, Yu Jun-Sheng, Jiang Ya-Dong
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  • 研究了基于红色荧光染料3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene(DCDDC)的白色有机电致发光器件的性能,分别制备了基于DCDDC超薄层和DCDDC掺杂主体材料的两种器件结构: 1)indium-tin oxide(ITO)/N, N′-diphenyl-N, N′-bis(1-naphthyl-pheny1)-1, 1′-biphenyl-4,
    White organic light-emitting devices based on a red fluorescent dye 3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene(DCDDC) were fabricated and investigated. Two kinds of devices were processed using ultrathin technology and doping technology. The structures of the devices were as followed: 1) indium-tin oxide (ITO)/N, N′-diphenyl-N, N′-bis(1-naphthyl-pheny1)-1, 1′-biphenyl-4, 4′-diamine (NPB)/4, 4′-bis(2, 2′-diphenylvinyl)-1, 1′-diphenyl (DPVBi)/tris(8-quinolinolato) aluminum (Alq3)/DCDDC/Alq3/Mg:Ag; 2) ITO/NPB /Alq3:DCDDC/NPB/2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline (BCP)/Mg:Ag. The luminescence and efficiency characteristics of these two devices were measured and compared. The results showed that both devices A and B exhibited white light consisting of RGB three primary colors. Moreover, device A had a turn on voltage of 4 V, a maximum power efficiency of 2.4 lm/W at 5.5 V and a maximum luminance of 16690 cd/m2 at 185 V. Also, pure white emission with Commissions Internationale De L’Eclairage (CIE) coordinates near (0.330. 0.300) having a slight variation of (-0.020, +0.002) in a wide range of voltages was observed. In contrast, devices B showed a turn on voltage of 5 V, a maximum power efficiency of 1.4 lm/W at 5.5 V and a maximum luminance of 12580 cd/m2 at 17 V. The CIE coordinates had a red shift as the voltage increased and then kept near the optimum white point of (0.33, 0.33) over 9 V. It was found that the difference in characteristics of these two devices was dependent on the variation of charge recombination zone. To be specific, it was due to the direct charge trapping effect of DCDDC ultrathin layer and the properties of incomplete energy transfer in Alq3:DCDDC doping system.
    • 基金项目: 国家自然科学基金(批准号: 60721001),国家高技术研究发展计划(863)项目(批准号: 2007AA03Z424),教育部新世纪优秀人才计划(批准号: NCET-06-0812)和电子科大中青年学术带头人计划(批准号: 060206)部分资助的课题.
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  • 文章访问数:  7536
  • PDF下载量:  1274
  • 被引次数: 0
出版历程
  • 收稿日期:  2008-12-26
  • 修回日期:  2009-04-07
  • 刊出日期:  2009-11-20

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