Polymer encapsulation of flexible top-emitting organic light-emitting devices with improved light extraction by integrating a microstructure
Polymer encapsulation of flexible top-emitting organic light-emitting devices with improved light extraction by integrating a microstructure
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通过集成微结构改善光提取的柔性顶发射有机发光器件的聚合物封装
DOI：
10.1016/j.orgel.2014.07.023
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发表时间：
2014-11-01
影响因子：
3.2
通讯作者：
Sun, Hong-Bo
中科院分区：
文献类型：
--
作者：
Liu, Yue-Feng;Feng, Jing;Sun, Hong-Bo
一种封装的柔性顶部发光有机发光器件(FTOLED)通过将微结构集成到聚合物封装薄膜上而提高了效率。采用软纳米压印光刻技术将微结构集成到聚合物表面，实现了高质量、低成本、可重复使用的聚二甲基硅氧烷模具的大面积制造。通过在聚合物封装薄膜上集成微结构和二维锥形微柱阵列，改善了FTOLED的出光性能，由于其折射率的逐渐变化，可以通过提高全反射临界角来抑制反射。此外，微结构表面由于其高接触角而表现出疏水性，这使得在实际应用中具有自清洁能力，以保护FTOLED不受水滴和尘埃颗粒的污染。(C)2014爱思唯尔B.V.保留所有权利。
An improved efficiency from an encapsulated flexible top-emitting organic light-emitting device (FTOLED) has been demonstrated by integrating a microstructure onto the polymer encapsulation film. Soft-nanoimprint lithography is employed to integrate the microstructure onto the polymer surface, which enables large area fabrication with high quality, low cost, and repeatable use of the poly(dimethylsiloxane) mold. The light extraction of the FTOLEDs has been improved by integrating the microstructure with two-dimensional tapered micropillars array on the polymer encapsulation film, which can suppress the reflection by enhancing the critical angle of total reflection owing to its gradually changed refractive index. Moreover, the microstructured surface exhibits a hydrophobic property owing to its high contact angle, which results in a self-cleaning ability to protect the FTOLEDs from being polluted by water droplets and dust particles in practical applications. (C) 2014 Elsevier B.V. All rights reserved.