Defect-engineered black tetragonal-tungsten-bronze ferroelectric crystal for full spectrum absorption and broadband photoelectronic conversion.

ABSTRACT: Ferroelectric crystals have emerged as promising candidates for exotic optoelectronic platforms. However, the wide bandgaps of transparent ferroelectric crystals restrict their ultraviolet optical activity, hindering broadband photoelectric conversion. Herein, a hierarchical defect engineering strategy is proposed for ferroelectric oxides to achieve full-spectrum optical absorption and boost broadband self-powered photodetection. Based on the transparent calcium barium niobate crystal, red Ce:CSBN is designed through the cooperative isovalent substitution of Sr²⁺ and aliovalent substitution of Ce³⁺. Furthermore, a black Ce:CSBN crystal is fabricated via thermal reduction, which demonstrated ultra-broadband absorption from the ultraviolet to the mid-infrared range. Thi

SUBMITTER: Wang Y 

PROVIDER: S-EPMC12508062 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature