中国物理B ›› 2008, Vol. 17 ›› Issue (8): 3097-3102.doi: 10.1088/1674-1056/17/8/055

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White organic light-emitting device with\ both phosphorescent and fluorescent emissive layers

张丽娟, 华玉林, 吴小明, 王 宇, 印寿根   

  1. Laboratory of Display Materials and Photoelectric Devices, Ministry of Education; Key Laboratory of Photoelectric Materials and Devices of Tianjin, Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China
  • 收稿日期:2007-10-29 修回日期:2007-11-29 出版日期:2008-08-20 发布日期:2008-08-20

White organic light-emitting device with both phosphorescent and fluorescent emissive layers

.. Zhang Li-Juan(张丽娟), Hua Yu-Lin(华玉林), Wu Xiao-Ming(吴小明), Wang Yu(王宇), and Yin Shou-Geng(印寿根)   

  1. Laboratory of Display Materials and Photoelectric Devices, Ministry of Education; Key Laboratory of Photoelectric Materials and Devices of Tianjin, Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China
  • Received:2007-10-29 Revised:2007-11-29 Online:2008-08-20 Published:2008-08-20

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摘要： This paper reports the fabrication of novel white organic light-emitting device(WOLED) by using a high efficiency blue fluorescent dye $N$-(4-((E)-2-(6-((E)-4-(diphenylamino)styryl)naphthalen-2-yl)vinyl)phenyl)-$N$-phenylbenzenamine ($N$-BDAVBi) and a red phosphoresecent dye bis (1-(phenyl) isoquinoline) iridium (III) acetylanetonate (Ir(piq)$_{2}$(acac)). The configuration of the device was ITO/PVK:TPD/CBP: $N$-BDAVBi /CBP/ BALq: Ir(piq)$_{2}$(acac)/BCP/Alq$_{3}$/LiF:AL. By adjusting the proportion of the dopants ($N$-BDAVBi, Ir(piq)$_{2}$(acac)) in the light-emitting layer, white light with Commission Internationale de l'Eclairage (CIE) coordinates of (0.35, 0.35) and a maximum luminance of 25350cd/m$^{2}$ were obtained at an applied voltage of 22V. The WOLED exhibits maximum external quantum and current efficiency of 6.78{\%} and 12cd/A respectively. By placing an undoped spacer CBP layer between the two light-emitting layers and using BCP as hole blocking layer, the colour stabilization slightly changed when the driving voltage increased from 6 to 22\,V.

关键词: WOLED, colour stability, $N$-BDAVBi

Abstract: This paper reports the fabrication of novel white organic light-emitting device(WOLED) by using a high efficiency blue fluorescent dye $N$-(4-((E)-2-(6-((E)-4-(diphenylamino)styryl)naphthalen-2-yl)vinyl)phenyl)-$N$-phenylbenzenamine ($N$-BDAVBi) and a red phosphoresecent dye bis (1-(phenyl) isoquinoline) iridium (III) acetylanetonate (Ir(piq)$_{2}$(acac)). The configuration of the device was ITO/PVK:TPD/CBP: $N$-BDAVBi /CBP/ BALq: Ir(piq)$_{2}$(acac)/BCP/Alq$_{3}$/LiF:AL. By adjusting the proportion of the dopants ($N$-BDAVBi, Ir(piq)$_{2}$(acac)) in the light-emitting layer, white light with Commission Internationale de l'Eclairage (CIE) coordinates of (0.35, 0.35) and a maximum luminance of 25350cd/m$^{2}$ were obtained at an applied voltage of 22V. The WOLED exhibits maximum external quantum and current efficiency of 6.78% and 12cd/A respectively. By placing an undoped spacer CBP layer between the two light-emitting layers and using BCP as hole blocking layer, the colour stabilization slightly changed when the driving voltage increased from 6 to 22 V.

Key words: WOLED, colour stability, $N$-BDAVBi

中图分类号:  (Light-emitting devices)

  • 85.60.Jb
78.60.Fi (Electroluminescence)