Polarizers play a key role in generating polarized light for display, imaging, and data communication, but adoption often suffers from high optical loss. Recently, due to superior optoelectronic properties, halide perovskites have been widely developed for lighting applications; however, highly polarized emission (polarization degree >0.8) has not yet been realized with perovskites. Herein, by incorporating inkjet printing and an anodic aluminum oxide (AAO) confinement strategy, highly ordered perovskite nanowire (NW) arrays are demonstrated for anisotropic optical applications. The optical device based on perovskite NW arrays reveals a high photoluminescence external quantum efficiency of 21.6% and emits highly polarized light with polarization degree up to 0.84. The highly polarized emission from perovskite NW arrays has potential to considerably reduce the optical loss of polarizers, which may attract great interest in developing polarized light sources for next‐generation optoelectronic applications.

中文翻译：

---

钙钛矿纳米线阵列膜的巨大光学各向异性

偏振器在产生用于显示，成像和数据通信的偏振光中起着关键作用，但是采用通常会遭受很高的光学损耗。近来，由于优异的光电性能，卤化物钙钛矿已被广泛开发用于照明应用。然而，钙钛矿尚未实现高偏振发射（偏振度> 0.8）。在本文中，通过结合喷墨打印和阳极氧化铝（AAO）限制策略，已证明高度有序的钙钛矿纳米线（NW）阵列可用于各向异性光学应用。基于钙钛矿NW阵列的光学器件显示出21.6％的高光致发光外部量子效率，并发出偏振度高达0.84的高偏振光。