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首页> 外文期刊>ACS applied materials & interfaces >Thermally Activated Delayed Fluorescence Pendant Copolymers with Electron- and Hole-Transporting Spacers
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Thermally Activated Delayed Fluorescence Pendant Copolymers with Electron- and Hole-Transporting Spacers

机译：具有电子和空穴传输间隔物的热活化延迟荧光侧共聚物

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摘要

To study the effect of hole- and electron-transporting spacers in copolymers on the thermally activated delayed fluorescence (TADF) properties and device efficiency of copolymers, two series of copolymers PCzPT-x and POPT-x have been designed and synthesized successfully. In these copolymers, 2-(10H-phenothiazin-10-yl)dibenzothiophene-S,S-dioxide units give green-yellow TADF, while hole-transporting 9-(4-vinylphenyl)-9H-carbazole units or electron-transporting diphenyl(4-vinylphenyl)phosphine oxide act as spacers or hosts. Their thermal, electrochemical, photo-physical, and electroluminescent properties and theoretical calculations are systematically investigated to illustrate the relationships between molecular structures and photophysical properties. By optimizing the upconversion and radiative decay rate and managing the energy transfer, a green-yellow device based on POPT-25 achieves a maximum external quantum efficiency of 5.2%, a current efficiency of 16.8 cd/A, and a power efficiency of 7.8 lm/W with CIE coordinates of (0.36, 0.50). Moreover, an external quantum efficiency of 3.5% at the practical luminescence of 100 cd/m(2) is obtained.
机译：为了研究孔和电子传输间隔物在共聚物中的效果，在热活化的延迟荧光（TADF）性能和共聚物的装置效率上，已经设计和合成了两种共聚物PCZPT-X和POPT-X。在这些共聚物中，2-（10h-吩噻嗪-10-基）二苯并噻吩-S，S二氧化噻吩，得到绿色黄色TADF，而空穴输送9-（4-乙烯基苯基）-9H-咔唑单元或电子转移的二苯基（4-乙烯基苯基）磷化膦作为间隔物或宿主。系统地研究了它们的热，电化学，光学物理和电致发光性和理论计算，以说明分子结构和光学性质之间的关系。通过优化上变频和辐射衰减速率并管理能量转移，基于POPT-25的绿色黄色器件实现了最大外部量子效率为5.2％，电流效率为16.8℃/ A，功率效率为7.8 LM / W的CIE坐标（0.36,0.50）。此外，获得了100cd / m（2）的实际发光下的3.5％的外量子效率。

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