Enhanced efficiency of organic light-emitting devices by using a directly imprinted nanopillared ultrathin metallic electrode
Enhanced efficiency of organic light-emitting devices by using a directly imprinted nanopillared ultrathin metallic electrode
复制标题
通过使用直接压印纳米柱超薄金属电极提高有机发光器件的效率
DOI：
10.1364/ol.402754
复制
发表时间：
2020-09-01
期刊：
影响因子：
3.6
通讯作者：
Sun, Hong-Bo
中科院分区：
文献类型：
--
作者：
Ma, Chi;Liu, Yue-Feng;Sun, Hong-Bo
具有高透过率和高导电性的金属氧化物薄膜是一种很有前途的有机电致发光器件（OLED）透明电极。然而，平庸的表面形态和。蒸发金属膜的连续性和金属电极与有机层之间的表面等离子体激元（SPP）能量损失仍然限制OLED的外量子效率（EQE）。在这里，纳米压印光刻已被直接施加在具有下面的未固化的光聚合物的多孔Au膜上以制造纳米柱阳极。由于连续性和表面光滑度的改善，纳米柱化的Au Au薄膜的导电性和透射率都得到了提高。正如我们预期的那样，SPPs模式已经耦合成光子，并通过使用纳米柱Au膜阳极从OLED中进一步提取。最后，与以ITO和Au为阳极的平面器件相比，电流效率分别提高了19.2%和70.1%。(C)2020美国光学学会
An ultrathin metal film with high transmittance and conductivity has been demonstrated to be a promising transparent electrode for organic light-emitting devices (OLEDs). However, mediocre surface morphology and. continuity of evaporated metal films and the surface plasmon-polaritons (SPPs) energy loss between the metal electrode and organic layer still limit the external quantum efficiency (EQE) of OLEDs. Here, nanoimprint lithography has been directly applied on the ultrathin Au film with underlying uncured photopolymer to fabricate the nanopillared anode. Both the conductivity and transmittance of the nanopillared ultrathin Au film have been improved due to the improvement of continuity and surface smoothness. As we expected, the SPPs mode has been coupled into photons and further extracted from OLEDs by using the nanopillared Au film anode. Finally, 19.2% and 70.1% enhancement of current efficiency were achieved compared to the planar device with ultrathin Au anode and ITO anode, respectively. (C) 2020 Optical Society of America