Precisely Tailoring Ferroelectric Photocurrent via Magnetic Spin Chain toward Efficient Self-Powered UV Photodetectors

作者：Qiligeer Bai, Xiaoxu Bao, Chunyan He, Dan Wu, Yulong Bai, Shifeng Zhao · 发表于：The Journal of Physical Chemistry C · 年份：2024 · DOI：10.1021/acs.jpcc.4c04729 · 被引用次数：13 · 研究领域：Multiferroics and related materials、Perovskite Materials and Applications、2D Materials and Applications

The study of Aurivillius multiferroic films has become increasingly prevalent in the contents of solar energy and light-sensitive detectors. In principle, the characters of photocarrier separation driven by ferroelectric polarization can be candidates for self-powered photodetectors. In this work, magnetic Fe doping is proposed for constructing Fe–O–Fe spin chain structures, which not only serve as a scaffold for electron transport but also combine ferroelectric polarization and magnetic exchange in Bi 4 Ti 3– x Fe x O 12 ( x = 0, 0.5, 0.7, 0.8, 0.9, and 1.0) multiferroic UV photodetector. Using this approach, the precise control of the photocurrent and the performance improvement of the photoelectric readout are then realized, with a noise equivalent power of 9.8 × 10 –14 W and detectivity D * ∼ 7.2 × 10 12 Jones. Furthermore, the outstanding energy conversion of ∼3.7% under AM 1.5 G irradiation is significant for future practical self-powered detection.