Stable Enantiomers Displaying Thermally Activated Delayed Fluorescence: Efficient OLEDs with Circularly Polarized Electroluminescence
Stable Enantiomers Displaying Thermally Activated Delayed Fluorescence: Efficient OLEDs with Circularly Polarized Electroluminescence
复制标题
显示热激活延迟荧光的稳定对映体：具有圆偏振电致发光的高效 OLED
DOI：
10.1002/anie.201800198
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发表时间：
2018-03-05
影响因子：
16.6
通讯作者：
Chen, Chuan-Feng
中科院分区：
文献类型：
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作者：
Li, Meng;Li, Si-Hua;Chen, Chuan-Feng
通过在非手性TADF单元上引入手性1,2-二氨基环己烷，合成了基于芳酰亚胺的热激活延迟荧光（TADF）对映体(+)-(S，S)- cai - cz和（-）（R，R）- cai - cz。TADF对映体的plqy高达98%，δ E-ST值较小，仅为0.06 eV，瞬态PL光谱具有明显的温度依赖性，具有良好的TADF性能。此外，TADF对映体具有镜像CD和CPL活性。值得注意的是，基于TADF对映体的具有CPEL特性的cp - oled不仅获得了高达19.7和19.8%的高EQE值，而且显示出相反的CPEL信号，g（EL）值分别为-1.7 X 10（-3）和2.3 X 10(-3)，这是基于对映体纯TADF材料的cp - oled首次具有高效率和强烈的CPEL。
Aromatic-imide-based thermally activated delayed fluorescent (TADF) enantiomers, (+)-(S,S)-CAI-Cz and (-)(R,R)-CAI-Cz, were efficiently synthesized by introducing a chiral 1,2-diaminocyclohexane to the achiral TADF unit. The TADF enantiomers exhibited high PLQYs of up to 98%, small Delta E-ST values of 0.06 eV, as well as obvious temperature-dependent transient PL spectra, thus demonstrating their excellent TADF properties. Moreover, the TADF enantiomers showed mirror-image CD and CPL activities. Notably, the CP-OLEDs with CPEL properties based on the TADF enantiomers not only achieved high EQE values of up to 19.7 and 19.8%, but also displayed opposite CPEL signals with g(EL) values of -1.7 X 10(-3) and 2.3 X 10(-3), which represents the first CP-OLEDs, based on the enantiomerically pure TADF materials, having both high efficiencies and intense CPEL.