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.

柔性有机发光二极管（OLED）是生物医学应用中很有前途的光源。然而，由于环境稳定性差，这些柔性设备的使用受到其保质期短的限制。据报道，通过用银代替铝等对空气敏感的金属和用作 n 掺杂剂的碱金属来制造长寿命的柔性 OLED。此外，为了实现稳定高效的柔性 OLED，我们将光学腔长度调整至二阶干涉最大值。该器件设计封装简单，可提高柔性 OLED 的空气稳定性，其保质期超过 130 天，而传统结构仅在 12 天后就会出现降解。所提出的制造柔性 OLED 的设计展示了该设备在可穿戴生物电子应用中的巨大潜力。