具有随机分散纳米图案的有机发光二极管中光提取效率的提高

Enhanced light extraction efficiency in organic light-emitting diode with randomly dispersed nanopattern.

作者信息

Kim Yang Doo, Han Kyung-Hoon, Sung Young Hoon, Kim Jung-Bum, Choi Hak-Jong, Lee Heon, Kim Jang-Joo

出版信息

Opt Lett. 2015 Dec 15;40(24):5838-41. doi: 10.1364/OL.40.005838.

DOI:10.1364/OL.40.005838

Abstract

An optical scattering layer composed of randomly dispersed nanopatterns (RDNPs) was introduced in an organic light-emitting diode (OLED) to increase the out-coupling efficiency. An RDNP was fabricated by direct printing on a glass substrate. Owing to its low haze and high transmittance, the RDNP acted as a light extraction layer in the OLED. The RDNP OLEDs showed higher current density and luminance than the reference devices at the same voltage. The current and power efficiencies of the RDNP OLED increased by 25% and 34%, respectively, without electrical degradation. Furthermore, the RDNP devices achieved an external quantum efficiency of 27.5% at 1 mA/cm².

摘要

在有机发光二极管（OLED）中引入了由随机分散的纳米图案（RDNP）组成的光学散射层，以提高光出射耦合效率。通过直接印刷在玻璃基板上制备了RDNP。由于其低雾度和高透射率，RDNP在OLED中充当光提取层。在相同电压下，RDNP OLED比参考器件表现出更高的电流密度和亮度。RDNP OLED的电流效率和功率效率分别提高了25%和34%，且没有电性能退化。此外，RDNP器件在1 mA/cm²时实现了27.5%的外量子效率。