Improving the air stability of flexible top-emitting organic light-emitting diodes

IF 12.3 1区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC npj Flexible Electronics Pub Date : 2024-08-24 DOI:10.1038/s41528-024-00338-8
Mina Riahi, Kou Yoshida, Ifor D. W. Samuel
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Abstract

Flexible organic light-emitting diodes (OLEDs) are promising light sources for biomedical applications. However, the use of these flexible devices has been restricted by their short shelf lifetimes due to poor ambient stability. Here, the fabrication of a long-lived flexible OLED is reported by replacing air-sensitive metals such as aluminum, and alkali metals used as n dopants, with silver. In addition, to achieve stable and efficient flexible OLEDs we tuned the optical cavity length to the second-order interference maximum. The device design has simple encapsulation and leads to an improvement in the air stability of flexible OLEDs which show a shelf lifetime of greater than 130 days whereas the conventional structure exhibits degradation after only 12 days. The proposed design for making flexible OLEDs demonstrates a great potential for using the devices for wearable bioelectronic applications.

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提高柔性顶部发光有机发光二极管的空气稳定性
柔性有机发光二极管(OLED)是生物医学应用中前景广阔的光源。然而,由于环境稳定性差,这些柔性器件的保质期很短,限制了它们的使用。本文报告了用银取代铝等对空气敏感的金属和用作正掺杂剂的碱金属,从而制造出长寿命柔性 OLED 的过程。此外,为了实现稳定高效的柔性有机发光二极管,我们将光腔长度调整到了二阶干涉最大值。该器件设计封装简单,提高了柔性有机发光二极管在空气中的稳定性,其保质期超过 130 天,而传统结构仅在 12 天后出现降解。所提出的柔性 OLED 设计为可穿戴生物电子应用展示了巨大的潜力。
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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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