Vacuum-deposited MoO3/Ag/WO3 multilayered electrode for highly efficient transparent and inverted organic light-emitting diodes
Vacuum-deposited MoO3/Ag/WO3 multilayered electrode for highly efficient transparent and inverted organic light-emitting diodes
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DOI：
10.1016/j.orgel.2018.05.014
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发表时间：
2018-08
影响因子：
3.2
通讯作者：
Tzu‐Hung Yeh;C. Lee;Chun-Jen Shih;Gautham Kumar;S. Biring;Shun‐Wei Liu
中科院分区：
文献类型：
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作者：
Tzu‐Hung Yeh;C. Lee;Chun-Jen Shih;Gautham Kumar;S. Biring;Shun‐Wei Liu
报道了一种高效透明倒置有机电致发光器件（OLED），该器件采用真空沉积的MoO3（5 nm）/Ag（12 nm）/WO3（40 nm）（MAW）多层膜电极，具有4.2 Ω/sq的低方块电阻，在500 - 550 nm波长范围内的平均透射率为88%，表面光滑，均方根粗糙度为0.339 nm。具有MAW阳极的倒置磷光OLED表现出62.1lm/W的总（底部和顶部发射的总和）最大功率效率和20.1%的外部量子效率。此外，该透明器件可以实现几乎相等的1：1.1的底部到顶部的发射比和在可见光范围内> 80%的总透射率。更好的器件性能源于透明MAW电极作为覆盖层来调制器件的底部/顶部发射方向和光学性质。
We report a highly efficient transparent and inverted organic light-emitting diode (OLED) with a vacuum-deposited MoO3(5 nm)/Ag (12 nm)/WO3(40 nm) (MAW) multilayered electrode having a low sheet resistance of 4.2 Ω/sq, an average transmittance of 88% at a wavelength of 500–550 nm, and a smooth morphology with a root-mean-square roughness of 0.339 nm. The inverted phosphorescent OLED with MAW anode exhibits a total (sum of the bottom and top emissions) maximum power efficiency of 62.1 l m/W and an external quantum efficiency of 20.1%. In addition, the transparent device can achieve almost equal bottom-to-top emission ratio of 1:1.1 and a total transmittance of >80% in the visible-light range. The better device performance arises from the transparent MAW electrode acting as a capping layer to modulate the bottom/top emission direction and the optical properties of the device.