Self-Powered Bi₆Ti₃Fe₂O₁₈@CuO Core–Shell Ferroelectric Photodetectors Realizing Encryption Communication

Optoelectronic logics are promising units of data encryption, which struggle with complex manufacture, owing to their fixed photodetection mode. Core–shell heterostructure Bi 6 Ti 3 Fe 2 O 18 @CuO ferroelectric photodetectors were fabricated by a one-pot method, which hosted UV detection and encrypted optical communication. The CuO quantum dot assembled homotypic transport shell was adopted in photodetectors, and the core–shell interfacial heterojunction as well as the ferroelectric core drove photocarrier separation. The Bi 6 Ti 3 Fe 2 O 18 @CuO (4 mg/mL) photodetectors show a self-powered performance of R ∼ 0.85 A/W, D * ∼ 4.9 × 10 12 Jones, and EQE ∼ 25.3%, which provide a simple strategy for encrypted communication. The dual-band (388 and 420 nm) photocurrent as a type of weight-factor, encrypted optical communication is realized based on “AND” optoelectronic logical operation, where the Chinese characters and capital letters “IMU” are showcased.