Triptycene-derived TADF enantiomers displaying circularly polarized luminescence and high-efficiency electroluminescence
Triptycene-derived TADF enantiomers displaying circularly polarized luminescence and high-efficiency electroluminescence
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DOI：
10.1016/j.orgel.2021.106355
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发表时间：
2021-12
影响因子：
3.2
通讯作者：
Yin‐Feng Wang;Cheng Chen;Lingyun Cui;Jin‐Ming Teng;Meng Li;Hai‐Yan Lu;Chuan-feng Chen
中科院分区：
文献类型：
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作者：
Yin‐Feng Wang;Cheng Chen;Lingyun Cui;Jin‐Ming Teng;Meng Li;Hai‐Yan Lu;Chuan-feng Chen
设计并合成了一对基于手性三蝶烯骨架的新型圆偏振热激活延迟荧光（CP-TADF）对映体（+）-（S，S）-CTRI-Cz和（-）-（R，R）-CTRI-Cz。三蝶烯衍生物对映体具有明显的TADF活性，单重态-三重态能隙（ΔEST）为0.20 eV，特征延迟寿命为15.4 μs。此外，TADF对映体显示镜像圆二色性（CD）和圆偏振发光（CPL）活性，其发光不对称因子（glum）约为±0.9 × 10−3。最后，使用TADF对映体作为发射体，优化的有机发光二极管（OLED）的最大外量子效率（EQEmax）、电流效率（CEmax）和功率效率（PEmax）分别为15.0%、48.8 cd/A和46.9 lm/W。
A pair of novel circularly polarized thermally activated delayed fluorescence (CP-TADF) enantiomers (+)-(S,S)-CTRI-Czand (−)-(R,R)-CTRI-Czbased on chiral triptycene scaffold were designed and synthesized. The obtained triptycene-derived enantiomers displayed obvious TADF activities with small singlet-triplet energy gap value (ΔEST) of 0.20 eV and characteristic microsecond delayed lifetime of 15.4 μs. Moreover, the TADF enantiomers showed mirror-image circular dichroism (CD) and circularly polarized luminescence (CPL) activities, and their luminescence dissymmetry factors (glum) were about ±0.9 × 10−3. Finally, by using the TADF enantiomers as emitters, the optimized organic light-emitting diodes (OLEDs) achieved maximum external quantum efficiency (EQEmax), current efficiency (CEmax) and power efficiency (PEmax) of 15.0%, 48.8 cd/A and 46.9 lm/W, respectively.