Lee Hakjun, Nam Hyewon, Yeo Hyo-Jin, Yang Heesun, Kim Taekyung
Department of Information Display, Hongik University, Seoul 04066, Korea.
Department of Materials Science and Engineering, Hongik University, Seoul 04066, Korea.
ACS Appl Mater Interfaces. 2023 Jul 26;15(29):35290-35301. doi: 10.1021/acsami.3c07064. Epub 2023 Jul 17.
The theoretical efficiency limit of fluorescence organic light-emitting diodes (OLEDs) was successfully surpassed by utilizing the localized surface plasmon resonance (LSPR) effect with conventional emissive materials. The interaction between polaritons and plexcitons generated during the LSPR process was also analyzed experimentally. As a result, the external quantum efficiency (EQE) increased dramatically from 6.01 to 15.43%, significantly exceeding the theoretical efficiency limit of fluorescent OLEDs. Additionally, we introduced a new concept of the LSPR effect, called "LSPR sensitizer", which allowed for simultaneous improvement in color conversion and efficiency through cascade transfer of the LSPR effect. To the best of our knowledge, the EQE and the current efficiency of our LSPR-OLED are the highest among LSPR-based fluorescent OLEDs to date.
通过将局域表面等离子体共振（LSPR）效应与传统发光材料相结合，成功超越了荧光有机发光二极管（OLED）的理论效率极限。还通过实验分析了LSPR过程中产生的极化子与复合激子之间的相互作用。结果，外量子效率（EQE）从6.01%大幅提高到15.43%，显著超过了荧光OLED的理论效率极限。此外，我们引入了一种新的LSPR效应概念，称为“LSPR敏化剂”，它通过LSPR效应的级联转移实现了颜色转换和效率的同时提高。据我们所知，我们的LSPR-OLED的EQE和电流效率是迄今为止基于LSPR的荧光OLED中最高的。
