具有合理设计的离子铱配合物和离子添加剂的电化学电池的增强亮度。
Enhanced Luminance of Electrochemical Cells with a Rationally Designed Ionic Iridium Complex and an Ionic Additive.
机构信息
Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street, Stop A5300, Austin, Texas 78712-1224, United States.
Department of Physics, The University of Texas at Dallas , 800 West Campbell Road, PHY 36, Richardson, Texas 75080-3021, United States.
出版信息
ACS Appl Mater Interfaces. 2016 Apr 13;8(14):8888-92. doi: 10.1021/acsami.6b01816. Epub 2016 Apr 1.
Light-emitting electrochemical cells (LEECs) offer the potential for high efficiency operation from an inexpensive device. However, long turn-on times and low luminance under steady-state operation are longstanding LEEC issues. Here, we present a single-layer LEEC with a custom-designed iridium(III) complex and a lithium salt additive for enhanced device performance. These devices display reduced response times, modest lifetimes, and peak luminances as high as 5500 cd/m(2), 80% higher than a comparable device from an unoptimized complex and 50% higher than the salt-free device. Improved device efficiency suggests that salt addition balances space charge effects at the interfaces. Extrapolation suggests favorable half-lives of 120 ± 10 h at 1000 cd/m(2) and 3800 ± 400 h at 100 cd/m(2). Overall, complex design and device engineering produce competitive LEECs from simple, single-layer architectures.
发光电化学电池 (LEEC) 为从廉价设备中获得高效率操作提供了潜力。然而，长开启时间和稳定状态下的低亮度仍然是 LEEC 的长期问题。在这里，我们提出了一种具有定制设计的铱(III)配合物和锂盐添加剂的单层 LEEC，以提高器件性能。这些器件显示出较短的响应时间、适度的寿命和高达 5500 cd/m(2)的峰值亮度，比未优化配合物的可比器件高 80%，比无盐器件高 50%。改进的器件效率表明盐的添加可以平衡界面处的空间电荷效应。推断表明，在 1000 cd/m(2)时半衰期为 120 ± 10 h，在 100 cd/m(2)时半衰期为 3800 ± 400 h。总的来说，通过简单的单层结构设计和器件工程，可以制造出具有竞争力的 LEEC。
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