Enhancing flexibility and reliability in wearable OLEDs through silbione-blended hybrimer-based encapsulation

IF 12.3 1区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Ki SuK Kang, So Yeong Jeong, Yongmin Jeon, Jeong Hyun Kwon, Kyung Cheol Choi
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Abstract

Numerous studies have aimed to improve the mechanical flexibility of thin-film encapsulation, a key obstacle in commercializing wearable organic light-emitting diodes (OLEDs). This study develops a silbione-blended organic/inorganic hybrid epoxy polymer (hybrimer) with high toughness as an organic barrier to enhance the flexibility of organic-inorganic multi-barriers. The optimal silbione-blended hybrimer (SBH) films exhibit superior mechanical properties, including increased elongation and tensile strength, compared to the hybrimer. The 3.5-dyad SBH-based encapsulation achieves a water vapor transmission rate of 7.83 × 10−6 g/m2/day and 9.45 × 10−5 g/m2/day before and after bending at a strain of 2%, respectively. In addition, the SBH barrier effectively protects the inorganic barrier by forming a robust aluminate phase at the interface between the inorganic and organic barrier, even under harsh conditions of 85 °C/85% relative humidity, demonstrating its potential for wearable applications. As a result, SBH-based encapsulations offer mechanical and environmental stability, making them ideal for wearable OLEDs.

Abstract Image

通过基于硅树脂混合聚合物的封装提高可穿戴oled的灵活性和可靠性
许多研究旨在提高薄膜封装的机械灵活性,这是可穿戴有机发光二极管(oled)商业化的关键障碍。本研究开发了一种具有高韧性的有机屏障材料——硅脂混合有机/无机杂化环氧聚合物(hybrimer),以提高有机-无机复合屏障的柔韧性。与杂化物相比,最佳的硅橡胶-混合杂化物(SBH)薄膜具有优异的机械性能,包括伸长率和抗拉强度的提高。3.5对shh包封在2%应变下,弯曲前后的水蒸气透过率分别为7.83 × 10−6 g/m2/day和9.45 × 10−5 g/m2/day。此外,即使在85°C/85%相对湿度的恶劣条件下,SBH屏障也能通过在无机和有机屏障之间的界面形成坚固的铝酸盐相,有效地保护无机屏障,显示出其可穿戴应用的潜力。因此,基于shh的封装提供了机械和环境稳定性,使其成为可穿戴oled的理想选择。
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来源期刊
CiteScore
17.10
自引率
4.80%
发文量
91
审稿时长
6 weeks
期刊介绍: npj Flexible Electronics is an online-only and open access journal, which publishes high-quality papers related to flexible electronic systems, including plastic electronics and emerging materials, new device design and fabrication technologies, and applications.
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