Outcoupling of trapped optical modes in organic light-emitting devices with one-step fabricated periodic corrugation by laser ablation
Outcoupling of trapped optical modes in organic light-emitting devices with one-step fabricated periodic corrugation by laser ablation
复制标题
通过激光烧蚀一步制造周期性波纹的有机发光器件中捕获光学模式的外耦合
DOI：
10.1016/j.orgel.2011.08.004
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发表时间：
2011-11-01
影响因子：
3.2
通讯作者：
Sun, Hong-Bo
中科院分区：
文献类型：
--
作者：
Bai, Yu;Feng, Jing;Sun, Hong-Bo
将微结构引入有机发光器件（OLED）被认为是一种有效的方法，可以将器件内波导（WG）和表面等离子体激元（SPP）模式中捕获的光子输出。然而，由于在有机材料上应用光刻图案化技术的困难，这一尝试受到了阻碍。在这里，我们展示了通过一步直接激光烧蚀 OLED 的空穴传输层而简单地达到了目的，而不会引起任何光学或电学劣化。通过实验，波纹 OLED 的效率提高了三倍，然后通过数值模拟将其归因于 SPP 和 WG 模式与辐射的有效外耦合。 (C) 2011 Elsevier B.V. 保留所有权利。
Introduction of microstructures into an organic light-emitting device (OLED) is being considered as an effective approach to outcouple photons trapped in waveguide (WG) and surface plasmon-polariton (SPP) modes within the devices. However, the attempt has been hampered by the difficulty in applying lithographic patterning technologies on organic materials. Here, we show the end has been simply reached by one-step directly laser ablating the hole-transporting layer of the OLEDs without inducing any optical or electrical deterioration. Three times efficiency enhancement has been experimentally attained from the corrugated OLEDs, which has then been ascribed by numerical simulation to the efficient outcoupling of the SPP and WG modes to radiation. (C) 2011 Elsevier B.V. All rights reserved.