Nb/Mn co‐doping enhances the pyroelectric properties of Na0.5Bi4.5Ti4O15 ceramics for infrared detection

• DOI: 10.1111/jace.20032
• Publication Date: 2024-07-20T05:35:46Z
• Authors: Mingzhi Fan; Fangjie Cen; Ruisi Gao; Yangsheng Pan; Meng Shen; Haibo Zhang; Shenglin Jiang; Kanghua Li; Guangzu Zhang
• Keywords: Tetragonal crystal system; Orthorhombic crystal system; Infrared detector

Abstract The pyroelectric effect has wide applications in various fields, such as infrared imaging, detection, alarms, and the expanding field of smart homes. rapid advancement systems, focusing on miniaturization integration, requires detectors with high coefficients Curie temperatures to meet requirements integrated processes. However, temperature commercial lead zirconate titanate is limited <230°C, urgently looking for a breakthrough. Here, we explore pyroelectricity Na 0.5 Bi 4.5 Ti 4 O 15 (NBT) ceramics, characterized by (∼660°C). We systematically examined crystal structure modifications defect dipole effects Nb/Mn‐co‐doped NBT. lattice expansion, distortion TiO 6 octahedra, structural transformation tendency from orthorhombic tetragonal phase facilitate movements increasing temperature. Furthermore, Mn Nb elements result formation “–V ·· · –Mn ” –Nb dipoles, inducing additional polarization changes response variations. Finally, significantly improved coefficient 110 µC m 2 K –1 remarkable stability 25°C 300°C achieved NBTM‐5Nb ceramics. This co‐doping strategy enhancing performance can be expanded other systems substantially contribute advancing high‐performance materials detection.