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首页> 外文期刊>RSC Advances >Platinum(II) polymetallayne-based phosphorescent polymers with enhanced triplet energy-transfer: synthesis, photophysical, electrochemistry, and electrophosphorescent investigation
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Platinum(II) polymetallayne-based phosphorescent polymers with enhanced triplet energy-transfer: synthesis, photophysical, electrochemistry, and electrophosphorescent investigation

机译：具有增强的三重态能量转移的基于铂（II）的多金属金属基磷光聚合物：合成，光物理，电化学和电磷光研究

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摘要

Two series of new phosphorescent copolymers with bicarbazole-based platinum(II) polymetallayne backbones have been successfully prepared through Sonogashira cross-coupling with different Ir-III ppy-type (ppy = 2-phenylpyridine anion) complexes as phosphorescent centers. The photophysical investigations not only indicate a highly efficient triplet energy-transfer process from the polymetallayne segments to the phosphorescent units in the polymer solution, but also figure out the structure-property relationship between the triplet energy-transfer process and the energy-levels of different excited states. In addition, the phosphorescent copolymers can produce yellow-emitting phosphorescent OLEDs (PHOLEDs) with high EL efficiencies and a current efficiency (eta(L)) of 11.49 cd A(-1), an external quantum efficiency (hext) of 4.38%, a power efficiency (eta(P)) of 3.78 lm W-1, and red-emitting PHOLEDs with a eta(L) of 5.86 cd A(-1), eta(ext) of 10.1%, and a eta(P) of 2.29 lm W-1, representing very decent electroluminescent performances achieved by the phosphorescent copolymers. Herein, this work not only furnishes very important clues for further polishing of this category novel phosphorescent polymer, but also provides a new approach to the design and synthesis of highly efficient phosphorescent copolymers.
机译：通过以不同的Ir-III ppy型（ppy = 2-苯基吡啶阴离子）配合物为磷光中心的Sonogashira交叉偶联，成功制备了具有联咔唑基铂（II）多金属基骨架的两套新型磷光共聚物。光物理研究不仅表明聚合物溶液中从多金属亚乙基链段到磷光单元的高效三重态能量转移过程，而且还指出了三重态能量转移过程与不同能级之间的结构-性质关系。兴奋的状态。此外，该磷光共聚物可以生产出具有高EL效率和11.49 cd A（-1）的电流效率（eta（L）），4.38％的外部量子效率（hext）的发黄光的磷光OLED（PHOLED）。功率效率（eta（P））为3.78 lm W-1，并且发射红色的PHOLED的eta（L）为5.86 cd A（-1），eta（ext）为10.1％，且eta（P）具有2.29 lm W-1的强度，代表了磷光共聚物获得的非常好的电致发光性能。在此，这项工作不仅为进一步抛光这类新型磷光聚合物提供了非常重要的线索，而且为高效磷光共聚物的设计和合成提供了一种新方法。

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