Anode‐Patterned Monorail‐Structure Fiber‐Based Organic Light‐Emitting Diodes with Long Lifetime and High Performance for Truly Wearable Displays

Abstract

AbstractThis paper presents a novel monorail‐structure fiber‐based organic light‐emitting diode (MFOLED) with the anode patterned like a monorail to enhance operating reliability. The MFOLED improves the uniformity of layer thickness within the light‐emitting region on cylinder fiber despite using only a thermal evaporation method. The device exhibits outstanding operating lifetime (LT50, 720 h), luminance (59335 cd m−2), and current efficiency (70.89 cd A−1), the highest performances published to date. Additionally, red, green, and blue MFOLEDs are fabricated using the same method and driven by a microcontroller unit to confirm the feasibility of implementing fiber‐based subpixels. Based on these results, this work is expected to establish a new benchmark for fiber‐based OLEDs and contribute to the realization of truly wearable displays.