Improved light extraction of organic light emitting diodes with a nanopillar pattering structure

• 作 者: 高志翔 王华 郝玉英 苗艳勤 许并社
• 机 构: Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education,
• 出 处: Chinese Physics B
• 发表日期: 2013年11期
• 关键词: intensified recombination interfaces cathode injected have shadow crystalline de

We have investigated the properties of organic light emitting diodes(OLEDs)with a nanopillar patterning structure at organic–metal or organic–organic interfaces.The results demonstrate that the introduction of a nanopillar structure can improve the light extraction efficiency greatly.We also find that the number,height,and position of nanopillars all affect the light extraction of OLEDs.The maximum power efficiency of a device with an optimized nanopillar patterning mode can be improved to 2.47 times that of the reference device.This enhancement in light extraction originates from the improved injected carriers,the broadened charge recombination zone,and the intensified wave guiding effects.

We have investigated the properties of organic light emitting diodes (OLEDs) with a nanopillar patterning structure at organic-metal or organic-organic interfaces. The results demonstrate that the introduction of a nanopillar structure can improve the light extraction efficiency greatly. We also find that the number, height, and position of nanopillars all affect the light extraction of OLEDs. The maximum power efficiency of a device with an optimized nanopillar patterning mode can be improved to 2.47 times that of the reference device. This enhancement in light extraction originates from the improved injected carriers, the broadened charge recombination zone, and the intensified wave guiding effects.