A Solution Processed Flexible Nanocomposite Substrate with Efficient Light Extraction via Periodic Wrinkles for White Organic Light‐Emitting Diodes,Advanced Optical Materials

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A Solution Processed Flexible Nanocomposite Substrate with Efficient Light Extraction via Periodic Wrinkles for White Organic Light‐Emitting Diodes
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-10-08 , DOI: 10.1002/adom.201801015
Yilong Huang _{1,

2} , Yayun Liu _{1,

3} , Kareem Youssef ₁ , Kwing Tong ₁ , Yanhong Tian ₂ , Qibing Pei ₁

Affiliation

A new flexible nanocomposite substrate is reported to enhance the light outcoupling efficiency of white organic light‐emitting diodes (OLEDs). The substrate comprises silver nanowires as electrode and periodic wrinkles as external structures for light extraction. It can outcouple both the waveguide and substrate modes. With the optimized external light extraction structures, white OLEDs based on the nanocomposite substrates show external quantum efficiency (EQE) enhancement factor of 2.34 compared to control devices on indium tin oxide (ITO)/glass, with an EQE of (38.4 ± 2.7)%, a power efficiency of 85.8 ± 2.9 lm W⁻¹, and a current efficiency of 100.3 ± 7.1 cd A⁻¹ at luminance of 1000 cd m⁻². Moreover, the external wrinkles improve the spectral uniformity over a wide range of viewing angles, which is an important feature for lighting applications. The nanocomposite substrate is fully solution‐processed and thus can potentially lower the manufacturing cost of high‐efficiency flexible OLEDs.

中文翻译：

溶液处理的柔性纳米复合材料基板，可通过周期性皱纹有效地提取白色有机发光二极管的光。

据报道，一种新的柔性纳米复合材料基板可增强白色有机发光二极管（OLED）的光输出耦合效率。衬底包括作为电极的银纳米线和作为用于光提取的外部结构的周期性褶皱。它可以使波导模式和衬底模式互耦合。通过优化的外部光提取结构，与基于铟锡氧化物（ITO）/玻璃的控制设备相比，基于纳米复合材料基板的白色OLED的外部量子效率（EQE）增强因子为2.34，EQE为（38.4±2.7）％，在亮度为1000 cd m ^-2时，功率效率为85.8±2.9 lm W ^-1，电流效率为100.3±7.1 cd A ^-1。此外，外部褶皱可在较大的视角范围内改善光谱均匀性，这是照明应用的重要特征。纳米复合材料基板经过完全溶液处理，因此可以潜在地降低高效能柔性OLED的制造成本。

更新日期：2018-10-08

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