15‐1: Perovskite‐Quantum‐Wires‐Based Full‐Color Fiber Light‐Emitting Diodes for Flexible Electronics

Fiber light‐emitting diode (Fi‐LED), which can be used for wearable lighting and display devices, is one of the key components for fiber/textile electronics. However, it remains impediments to overcome on device fabrication with fiber‐like substrates, such as gravity‐induced nonuniform coating, lowquality crystallization, etc. Here, we uniformly grew perovskite quantum wires (PeQWs) by filling high‐density alumina nanopores on aluminum fibers by dip‐coating. The obtained PeQWs exhibit a prominent photoluminescence quantum yield of nearly 90% and a noticeable photoluminescence lifetime of up to 1,500 hours under ambient condition. With further conformal deposition of transporting layer and electrode, as well as the polydimethylsiloxane encapsulation, full‐color PeQWs‐based Fi‐LEDs with mechanical bendability, stretchability, and waterproof feature have been successfully demonstrated.