Color-stable and efficient stacked white organic light-emitting devices comprising blue fluorescent and orange phosphorescent emissive units

Color-stable and efficient stacked white organic light-emitting devices comprising blue fluorescent and orange phosphorescent emissive units
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包含蓝色荧光和橙色磷光发射单元的颜色稳定且高效的堆叠白色有机发光器件

DOI:
10.1063/1.2998598
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发表时间:
2008-10
影响因子:
4
通讯作者:
Xue, Qin
Xue, Qin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chen, Ping;Xie, Guohua;Liu, Shiyong;Duan, Yu;Hou, Jingying;Xie, Wenfa;Zhang, Liying;Zhao, Yi;Li, Bin;Xue, Qin

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我们已经证明了两种堆叠的白色有机发光二极管(WOLED)采用三(8-羟基喹啉)铝:20重量%的Mg/MoO 3作为电荷产生层。通过混合蓝色荧光和橙子磷光可以获得白色光发射。与双白色发光单元相比,单蓝光发光单元和橙子磷光发光单元的叠层结构具有更好的颜色稳定性和更高的发光效率,这是由于叠层结构避免了电荷复合区的移动,消除了蓝光和橙子发光层之间的Dexter能量转移。在1000 cd/m2下,叠层WOLED的效率为35.9 cd/A。
We have demonstrated two kinds of stacked white organic light-emitting diodes (WOLEDs) employing tri(8-hydroxyquinoline) aluminum:20 wt %Mg/MoO3 as charge generation layer. White light emission can be obtained by mixing blue fluorescence and orange phosphorescence. Stacked WOLED with individual blue fluorescent and orange phosphorescent emissive units has better color stability and higher efficiency than that with double white emissive units, which is attributed to the avoidance of the movement of charges recombination zone and elimination of the Dexter energy transfer between blue and orange emission layers occurring in the latter. The efficiency of the stacked WOLED is 35.9 cd/A at 1000 cd/m2.
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