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

This paper reports the fabrication of novel white organiclight-emitting device(WOLED) by using a high efficiency bluefluorescent 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 organiclight-emitting device(WOLED) by using a high efficiency bluefluorescent 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 organiclight-emitting device(WOLED) by using a high efficiency bluefluorescent 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 organiclight-emitting device(WOLED) by using a high efficiency bluefluorescent 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 adjustingthe proportion of the dopants ($N$-BDAVBi, Ir(piq)$_{2}$(acac)) inthe light-emitting layer, white light with Commission Internationalede l'Eclairage (CIE) coordinates of (0.35, 0.35) and a maximumluminance of 25350cd/m$^{2}$ were obtained at an applied voltage of22V. The WOLED exhibits maximum external quantum and currentefficiency of 6.78{%} and 12cd/A respectively. By placing anundoped spacer CBP layer between the two light-emitting layers andusing BCP as hole blocking layer, the colour stabilization slightlychanged when the driving voltage increased from 6 to 22,V.