Lee Ho Won, Yang Hyung Jin, Lee Seok Jae, Lee Song Eun, Koo Ja Ryong, Yoon Seung Soo, Park Jaehoon, Kim Young Kwan
J Nanosci Nanotechnol. 2014 Nov;14(11):8315-9. doi: 10.1166/jnn.2014.9911.
We suggested that Ni/Ag/Ni semitransparent electrodes for the exchange of indium-tin-oxide (ITO) electrode, which is the most commonly used as a transparent electrode in spite of the structural defects, limited supply of indium, and toxic, could be apply on flexible Organic Light-Emitting Diodes (OLEDs). Red phosphorescent OLEDs (PHOLEDs) using different types of electrodes as ITO and various conditions of Ni/Ag/Ni electrode were fabricated and analyzed. The electrical and optical properties of device using Ni/Ag/Ni electrode were improved than that of devices on ITO glass substrate at the 10,000 cd/m2 criterion due to the micro-cavity effect even though their transmittance has lower than ITO glass. In addition, we also fabricated red PHOLEDs of same structure on Ni/Ag/Ni flexible substrate of various conditions. As a result, flexible red PHOLED showed competitive characteristics compared to the device on a glass substrate. Therefore, this study could be suggested to additional research on flexible OLEDs display and light applications for ITO-free fabrication.
我们认为，尽管铟锡氧化物（ITO）电极存在结构缺陷、铟供应有限且有毒，但作为最常用的透明电极，可将Ni/Ag/Ni半透明电极用于替代ITO电极，并应用于柔性有机发光二极管（OLED）。我们制备并分析了使用不同类型电极（如ITO）以及不同条件下的Ni/Ag/Ni电极的红色磷光OLED（PHOLED）。尽管使用Ni/Ag/Ni电极的器件的透光率低于ITO玻璃，但由于微腔效应，在10000 cd/m²的标准下，使用Ni/Ag/Ni电极的器件的电学和光学性能比在ITO玻璃基板上的器件有所改善。此外，我们还在各种条件下的Ni/Ag/Ni柔性基板上制备了相同结构的红色PHOLED。结果，柔性红色PHOLED与玻璃基板上的器件相比表现出具有竞争力的特性。因此，本研究可为无ITO制造的柔性OLED显示和光应用的进一步研究提供参考。
