White organic light-emitting device with\ both phosphorescent and fluorescent emissive layers |
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Authors: | Zhang Li-Juan Hua Yu-Lin Wu Xiao-Ming Wang Yu and Yin Shou-Geng |
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Institution: | 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 |
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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)WOLED, colour stability,
$N$-BDAVBi7860F,7280LThis 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)WOLED, colour stability,
$N$-BDAVBi7860F,7280LThis 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)WOLED, colour stability,
$N$-BDAVBi7860F,7280LThis 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. |
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Keywords: | WOLED colour stability $N$-BDAVBi |
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