Toward Chiral Lasing from All‐Solution‐Processed Flexible Perovskite‐Nanocrystal–Liquid‐Crystal Membranes

• DOI: 10.1002/adma.202301573
• Publication Date: 2023-07-19T12:15:30Z
• Authors: Weixi Lin; Chao Yang; Yu Miao; Sen Li; Limin Zhang; Xiao‐Fang Jiang; Ying Lv; Bed Poudel; Kai Wang; Lakshminarayana P...; Chen Zhang; Guofu Zhou; Xiaowen Hu

Abstract Circularly polarized (CP) coherent light sources are of great potential for various advanced optical applications spanning displays/imaging to data processing/encryption and quantum communication. Here, the first demonstration CP amplified spontaneous emission (ASE)/lasing from a free‐standing flexible membrane device is reported. The consists perovskite nanocrystals (PNCs) cholesteric liquid crystals (CLCs) layers sandwiched within Fabry–Pérot (F–P) cavity architecture. chiral crystal enables generation device. completely solution‐processable displays ASE with record dissymmetry factor ( g lum ) as high 1.4, which 3 orders magnitude higher compared luminescence ligand‐capped colloidal PNCs. exhibits ultraflexibility intensity remains unchanged after repeated 100 bending cycles it stable more than months 80% its original intensity. Furthermore, objects different geometric surfaces covered This work not only demonstrates PNCs extremely but also opens door toward fabrication ultraflexible, stable, all laser devices.