Solution‐Processed Transparent Superhydrophobic Protection Layers for Enhancing the Device Reliability of Flexible Organic Optoelectronics,Advanced Materials Technologies

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Solution‐Processed Transparent Superhydrophobic Protection Layers for Enhancing the Device Reliability of Flexible Organic Optoelectronics
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-06-24 , DOI: 10.1002/admt.202000449
Daekyoung Yoo ₁ , Keehoon Kang ₁ , Youngrok Kim ₁ , Heebeom Ahn ₁ , Woocheol Lee ₁ , Jinsu Pak ₁ , Seungjun Chung ₂ , Takhee Lee ₁

Affiliation

Organic materials and devices have attracted great attention for implementation of flexible and transparent electronics applications. However, further easy‐to‐manage organic devices with acceptable environmental reliability in open air are desirable. Specifically, because water‐based threats and particle contamination can degrade the functions of organic optoelectronics, introducing a superhydrophobic protection layer onto organic devices, which can eliminate issues via excellent water repellency, is necessary. In this study, surface‐engineered TiO₂ nanoparticles dispersed in a highly fluorinated solvent are deposited on organic devices using organo‐compatible solution processing. The optimization of the TiO₂ nanoparticle layer, such as the surface roughness and thickness of the film, enables the realization of a transparent superhydrophobic layer; therefore, the film can be utilized in transparent organic optoelectronics, especially in phototransistor applications. The transparent superhydrophobic layer exhibits good water repellency without critical delamination issues even during mechanical deformation, such as bending and stretching tests. Flexible organic phototransistors with the transparent superhydrophobic layer show a self‐cleaning ability against harmful contaminants on the topmost surface, achieved by dropping water droplets. This work can provide a feasible solution to maintaining transparent and flexible organic devices with improved environmental reliability.

中文翻译：

解决方案处理的透明超疏水保护层，用于提高柔性有机光电器件的可靠性

有机材料和设备在实现柔性和透明电子应用方面引起了极大的关注。但是，需要在露天环境中具有易于接受且具有可接受的环境可靠性的有机设备。特别是，由于水基威胁和颗粒污染会降低有机光电器件的功能，因此有必要在有机器件上引入超疏水保护层，从而可以通过优异的疏水性消除问题。在这项研究中，使用有机兼容溶液处理将分散在高度氟化溶剂中的表面工程化TiO ₂纳米颗粒沉积在有机设备上。TiO ₂的优化纳米颗粒层，例如膜的表面粗糙度和厚度，使得能够实现透明的超疏水层；因此，该膜可用于透明有机光电，特别是在光电晶体管应用中。透明的超疏水层即使在机械变形（例如弯曲和拉伸测试）过程中，也具有良好的防水性，而没有严重的分层问题。带有透明超疏水层的柔性有机光电晶体管通过滴落水滴，能够对最表面的有害污染物具有自清洁能力。这项工作可以提供一种可行的解决方案，以维持透明和灵活的有机设备，并提高环境可靠性。

更新日期：2020-08-10

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