用掺杂 n 型电子传输层的四齿配位铂（II）配合物提高有机发光二极管的效率滚降和工作寿命。
Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer.
机构信息
Department of Chemistry, College of Science, Yanbian University, Yanji 133002, China.
State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
出版信息
Molecules. 2021 Mar 24;26(7):1835. doi: 10.3390/molecules26071835.
The efficiency roll-off and operational lifetime of organic light-emitting diodes (OLEDs) with a tetradentate Pt(II) emitter is improved by engaging an n-doped electron-transporting layer (ETL). Compared to those devices with non-doped ETL, the driving voltage is lowered, the charged carrier is balanced, and the exciton density in the emissive layer (EML) is decreased in the device with n-doped ETL with 8-hydroxyquinolinolatolithium (Liq). High luminance of almost 70,000 cd m and high current efficiency of 40.5 cd A at high luminance of 10,000 cd m is achieved in the device with 50 wt%-Liq-doped ETL. More importantly, the extended operational lifetime of 1945 h is recorded at the initial luminance of 1000 cd m in the 50 wt%-Liq-doped device, which is longer than that of the device with non-doped ETL by almost 10 times. This result manifests the potential application of tetradentate Pt(II) complexes in the OLED industry.
具有四齿 Pt(II)发射器的有机发光二极管 (OLED) 的效率下降和工作寿命通过使用 n 型掺杂电子传输层 (ETL) 得到改善。与没有掺杂 ETL 的器件相比，具有 n 型掺杂 ETL 的器件的驱动电压降低，载流子平衡，发射层 (EML) 中的激子密度降低，其中 ETL 掺杂了 8-羟基喹啉酸锂 (Liq)。在初始亮度为 1000 cd/m 时，具有 50wt%-Liq 掺杂 ETL 的器件的亮度高达 70,000 cd/m，电流效率高达 40.5 cd/A，亮度为 10,000 cd/m。更重要的是，在初始亮度为 1000 cd/m 时，50wt%-Liq 掺杂器件的工作寿命延长至 1945 小时，比未掺杂 ETL 的器件长约 10 倍。这一结果表明四齿 Pt(II)配合物在 OLED 行业中的潜在应用。
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