The first tandem, all-exciplex-based WOLED.

The first tandem, all-exciplex-based WOLED.
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DOI:
10.1038/srep05161
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发表时间:
2014-06-04
期刊:
影响因子:
4.6
通讯作者:
Chou PT
Chou PT
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hung WY;Fang GC;Lin SW;Cheng SH;Wong KT;Kuo TY;Chou PT

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利用我们最近开发的双层界面方法,以及新的宽能隙,低LUMO受体(A)和指定的供体(D)层,我们成功地制造了一个基于激基复合物的有机发光二极管(OLED)系统地从蓝色调谐到红色。进一步优化得到了创纪录的蓝色激基复合物OLED,ηext为8%。然后,我们构建了由mCP/PO-T2 T和DTAF/PO-T2 T的两个平行共混层配置的器件结构,分别产生蓝色和黄色激基复合物发射。由此产生的器件首次展示了串联的、基于全激基复合物的白光OLED(WOLED),其具有优异的效率ηext:11.6%、ηc:27.7 cd A−1和ηp:15.8 ml W−1,CIE(0.29,0.35)和CRI 70.6几乎与EL强度无关。  串联结构和混合层D/A(1:1)配置是充分利用激基复合物延迟荧光的两个关键要素,为使用低成本、丰富的有机化合物实现商业WOLED提供了典范。
Exploiting our recently developed bilayer interface methodology, together with a new wide energy-gap, low LUMO acceptor (A) and the designated donor (D) layers, we succeeded in fabricating an exciplex-based organic light-emitting diode (OLED) systematically tuned from blue to red. Further optimization rendered a record-high blue exciplex OLED with ηext of 8%. We then constructed a device structure configured by two parallel blend layers of mCP/PO-T2T and DTAF/PO-T2T, generating blue and yellow exciplex emission, respectively. The resulting device demonstrates for the first time a tandem, all-exciplex-based white-light OLED (WOLED) with excellent efficiencies ηext: 11.6%, ηc: 27.7 cd A−1, and ηp: 15.8 ml W−1 with CIE(0.29, 0.35) and CRI 70.6 that are nearly independent of EL intensity. The tandem architecture and blend-layer D/A (1:1) configuration are two key elements that fully utilize the exciplex delay fluorescence, providing a paragon for the use of low-cost, abundant organic compounds en route to commercial WOLEDs.
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