Bioinspired Thermal Armor Enables Perovskite Meta‐Aerogels with Spectrally Tailored Luminescence up to 600 K

Abstract

ABSTRACT High‐temperature flexible luminescent materials—enabling information transmission, safety monitoring, and operational reliability at extreme temperatures—have great potential for demanding applications such as metallurgy, petrochemical engineering, and fire protection. However, developing luminescent materials that integrate multicolor emission, high color purity, and mechanical flexibility at high temperatures remains an appealing yet formidable challenge. Herein, inspired by the multilevel architecture protecting pigments in the vividly colored butterfly's wing, we present a multiscale self‐confinement strategy to fabricate flexible perovskite luminescent nanofibrous meta‐aerogels with bioinspired thermal armor. Benefiting from multidimensional encapsulation to shield perovskite from extrinsic environmental perturbations and directional confinement to suppress ion migration and particle agglomeration, the biomimetic flexible meta‐aerogels achieve stable luminescence up to 600 K. The resulting meta‐aerogels exhibit tunable emission from blue to red and narrow‐band emission (full width at half maximum < 45 nm). Furthermore, the meta‐aerogels demonstrate excellent recovery after 500 compression cycles and temperature‐invariant superelasticity. These advancements highlight the significant potential of these materials for next‐generation flexible lighting and display applications under extreme conditions.