Flexible top-emitting organic light emitting diodes with a functional dielectric reflector on a metal foil substrate†,RSC Advances

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Flexible top-emitting organic light emitting diodes with a functional dielectric reflector on a metal foil substrate†
RSC Advances ( IF 3.9 ) Pub Date : 2018-07-20 00:00:00 , DOI: 10.1039/c8ra05759a
Kihyon Hong ₁ , Hak Ki Yu ₂ , Illhwan Lee ₃ , Sungjun Kim ₃ , Youngho Kim ₂ , Kisoo Kim ₃ , Jong-Lam Lee ₃

Affiliation

For flexible organic light emitting diodes (OLEDs), roll-to-roll production enables low-cost fabrication and wide-ranging applications. Choosing an appropriate substrate material is one of the critical issues in the fabrication of flexible OLEDs. We demonstrated top-emitting OLEDs with a highly reflective distributed Bragg reflector (DBR) using a metal foil substrate. The DBR, made of seven pairs of SiO₂/ZrO₂, was formed by electron-beam evaporation on metal foil and showed high reflectivity of 90.5% at λ = 500 nm. The DBR served not only as the optical reflector, but also the substrate insulating layer which enabled the electrical isolation and prevented crosstalk. The OLEDs showed an operation voltage of 6.5 V at a current density of J = 10 mA cm⁻² and maximum luminance of 17 400 cd m⁻² at J = 225 mA cm⁻². The electroluminescence property of the device could be maintained under the tensile bending condition.

中文翻译：

在金属箔基板上带有功能性介电反射器的柔性顶部发射有机发光二极管†

对于柔性有机发光二极管 (OLED)，卷对卷生产可实现低成本制造和广泛应用。选择合适的基板材料是柔性 OLED 制造中的关键问题之一。我们使用金属箔基板展示了具有高反射分布式布拉格反射器 (DBR) 的顶部发射 OLED。DBR由七对SiO ₂ /ZrO ₂组成，通过电子束蒸发在金属箔上形成，在λ =500 nm处显示出90.5%的高反射率。DBR 不仅用作光学反射器，还用作实现电隔离和防止串扰的基板绝缘层。在电流密度为J时，OLED 的工作电压为 6.5 V= 10 mA cm ^-2和J = 225 mA cm ^-2时的最大亮度为 17 400 cd m ^-2。器件的电致发光性能在拉伸弯曲条件下仍能保持。

更新日期：2018-07-20

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