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24.1% External Quantum Efficiency of Flexible Quantum Dot Light‐Emitting Diodes by Light Extraction of Silver Nanowire Transparent Electrodes
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-07-05 , DOI: 10.1002/adom.201800347
Ke Ding 1 , Yunsheng Fang 1 , Shaohua Dong 2 , Hongting Chen 1 , Beibei Luo 1 , Kui Jiang 3 , Honggang Gu 3 , Lianwei Fan 1 , Shiyuan Liu 3 , Bin Hu 1 , Lei Wang 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-07-05 , DOI: 10.1002/adom.201800347
Ke Ding 1 , Yunsheng Fang 1 , Shaohua Dong 2 , Hongting Chen 1 , Beibei Luo 1 , Kui Jiang 3 , Honggang Gu 3 , Lianwei Fan 1 , Shiyuan Liu 3 , Bin Hu 1 , Lei Wang 1
Affiliation
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Flexible quantum dot light‐emitting diodes (FQLEDs) always suffer poor performance, and current efforts towards performance improvement need complicated procedures but still ending with limited progress. An extremely efficient and simply structured FQLED is demonstrated profited from the substantially enhanced light outcoupling efficiency by employing solution‐processed flexible silver nanowires (AgNWs) transparent conductive electrodes (TCEs). As is uncovered by rigorous simulations, AgNWs TCEs extract enormous light trapped in the substrate mode and waveguide mode compared with indium tin oxide (ITO) TCEs, which greatly agrees with the experimental measurements in this work. As an ultimate achievement, the FQLED shows the record‐breaking maximum external quantum efficiency of 24.1% and current efficiency of 19.5 cd A−1, giving a ≈4.4 and 3 times efficiency improvement compared to the rigid QLED with glass/ITO, respectively. This study not only demonstrates the prominent role of network‐based TCEs for efficient ITO‐free FQLEDs, but also shows a lot of room for further performance improvement of flexible light‐emitting devices with the guideline of light extraction by solution‐processed electrodes.
中文翻译:
通过银纳米线透明电极的光提取,柔性量子点发光二极管的外部量子效率为24.1%
柔性量子点发光二极管(FQLED)始终会遇到性能不佳的问题,当前为提高性能而做出的努力需要复杂的过程,但进展有限。通过采用溶液处理的柔性银纳米线(AgNWs)透明导电电极(TCE),大大提高了光输出效率,从而证明了一种极其高效且结构简单的FQLED。正如严格的模拟所揭示的,与氧化铟锡(ITO)TCE相比,AgNWs TCE提取了在基板模式和波导模式下捕获的大量光,这与这项工作中的实验测量结果非常吻合。作为一项最终成就,FQLED显示了创纪录的最大外部量子效率24.1%和电流效率19.5 cd A -1与采用玻璃/ ITO的刚性QLED相比,效率分别提高了约4.4和3倍。这项研究不仅证明了基于网络的TCE在高效的不含ITO的FQLED中的突出作用,而且还显示了以溶液处理电极的光提取为指导的柔性发光器件进一步性能提升的巨大空间。
更新日期:2018-07-05
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
通过银纳米线透明电极的光提取,柔性量子点发光二极管的外部量子效率为24.1%
柔性量子点发光二极管(FQLED)始终会遇到性能不佳的问题,当前为提高性能而做出的努力需要复杂的过程,但进展有限。通过采用溶液处理的柔性银纳米线(AgNWs)透明导电电极(TCE),大大提高了光输出效率,从而证明了一种极其高效且结构简单的FQLED。正如严格的模拟所揭示的,与氧化铟锡(ITO)TCE相比,AgNWs TCE提取了在基板模式和波导模式下捕获的大量光,这与这项工作中的实验测量结果非常吻合。作为一项最终成就,FQLED显示了创纪录的最大外部量子效率24.1%和电流效率19.5 cd A -1与采用玻璃/ ITO的刚性QLED相比,效率分别提高了约4.4和3倍。这项研究不仅证明了基于网络的TCE在高效的不含ITO的FQLED中的突出作用,而且还显示了以溶液处理电极的光提取为指导的柔性发光器件进一步性能提升的巨大空间。