Recent Developments in Quantum Dot Light-Emitting Diodes for Skin-Attachable Electronics

Recent advances in skin-attachable electronics have attracted substantial interest because of their potential in various fields such as robotics, healthcare, and wearable technology. Among various electroluminescent (EL) devices, quantum dot light-emitting diodes (QLEDs) are promising for next-generation displays due to their superior color purity, high brightness, excellent efficiency, high stability, and ultrathin form factors, making them promising for flexible electronic applications. This review outlines the recent progresses in QLEDs for skin-attachable electronics. First, materials selection and various structural designs that impart mechanical flexibility into QLEDs are discussed. We also discussed the design strategies of flexible displays based on the array of QLEDs. Then, we summarize skin-attachable displays based on the flexible QLEDs, including the integration with sensors capable of detecting various signals. The discussion includes the promising role of skin-attachable QLEDs in healthcare, particularly their potential as wearable light sources for monitoring biologic signals. Overall, this review article highlights the remarkable progress made in the skin-attachable QLEDs.