Enhanced light extraction from organic light-emitting diodes by reducing plasmonic loss through graded photonic super-crystals
Enhanced light extraction from organic light-emitting diodes by reducing plasmonic loss through graded photonic super-crystals
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DOI：
10.1364/josab.387780
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发表时间：
2020-05-01
影响因子：
1.9
通讯作者：
Lin, Yuankun
中科院分区：
文献类型：
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作者：
Alnasser, Khadijah;Hassan, Safaa;Lin, Yuankun
在平面有机发光二极管 (OLED) 中，超过 50% 的发射光以波导模式被捕获在有机氧化锡锡层中，并以表面等离子体激元模式被捕获在金属和有机层界面处。当 OLED 的有机铝界面采用分级光子超晶体 (GPSC) 进行图案化时，通过分级图案破坏等离激元共振条件并将表面等离激元极化子散射到玻璃中，从而大大提高了进入玻璃基板的光提取效率。光提取效率随着 GPSC 中分级区域的面积分数而增加。对于八边形、正方形和三角形的GPSC，其分级区域的面积比例分别为53.9%、78.5%和90.7%，效率可达到68.5%、72.9%和78.9%以上。在采用三角形 GPSC 图案的 OLED 中，在波长 447、507 和 608 nm 下，光提取效率分别高达 83.0%、81.2% 和 79.0%，而目标效率为 70%。 (C) 2020 年美国光学学会
In a planar organic light-emitting diode (OLED), over 50% of emitted lights are trapped as a waveguide mode in the organic-indium tin oxide layer and as a surface plasmon polariton mode at the metal and organic layer interface. The light extraction efficiency into the glass substrate is greatly enhanced when the organidAl interface of the OLED is patterned with a graded photonic super-crystal (GPSC), by destroying the plasmonic resonance condition through graded patterns and by scattering the surface plasmon polariton into the glass. The light extraction efficiency increases with the area fraction of graded regions in the GPSC. The efficiency can reach above 68.5%, 72.9%, and 78.9% for octagonal, square, and triangular GPSCs with area fractions of the graded regions of 53.9%, 78.5%, and 90.7%, respectively. The light extraction efficiency goes up to 83.0%, 81.2%, and 79.0% at the wavelengths of 447, 507, and 608 nm, respectively, in OLED patterned with triangular GPSC, compared with the targeted efficiency of70%. (C) 2020 Optical Society of America