Full-color fiber light-emitting diodes based on perovskite quantum wires
Beitao Ren, Daquan Zhang, Xiao Qiu, Yucheng Ding, Qianpeng Zhang, Yu Fu, Jin‐Feng Liao, Swapnadeep Poddar, Chak Lam Jonathan Chan, Yang Cao, Chen Wang, Yu Zhou, Dai‐Bin Kuang, Haibo Zeng, Zhiyong Fan
Abstract
Fiber light-emitting diodes (Fi-LEDs), which can be used for wearable lighting and display devices, are one of the key components for fiber/textile electronics. However, there exist a number of impediments to overcome on device fabrication with fiber-like substrates, as well as on device encapsulations. Here, we uniformly grew all-inorganic perovskite quantum wire arrays by filling high-density alumina nanopores on the surface of Al fibers with a dip-coating process. With a two-step evaporation method to coat a surrounding transporting layer and semitransparent electrode, we successfully fabricated full-color Fi-LEDs with emission peaks at 625 nanometers (red), 512 nanometers (green), and 490 nanometers (sky-blue), respectively. Intriguingly, additional polydimethylsiloxane packaging helps instill the mechanical bendability, stretchability, and waterproof feature of Fi-LEDs. The plasticity of Al fiber also allows the one-dimensional architecture Fi-LED to be shaped and constructed for two-dimensional or even three-dimensional architectures, opening up a new vista for advanced lighting with unconventional formfactors.