A Self-Powered Broadband Photodetector with High Photocurrent Based on Ferroelectric Thin Film Using Energy Band Structure Design

• DOI: 10.3390/cryst14010079
• Publication Date: 2024-01-15T13:52:03Z
• Authors: Xing Gao; Xin Song; Shan Zhang; Xinxiang Yang; Pei Han; Liwen Zhang; Chunxiao Lu; Xihong Hao; Yong Li
• Keywords: Photocurrent; Photodetection; Photoelectric effect; Quantum Efficiency

Self-powered photodetectors have the advantages of high sensitivity, sustainability, and small size become a research hotspot in advanced optoelectronic systems. However, low output photocurrent density seriously hinders practical application ferroelectric self-powered photodetectors. Herein, high-efficiency photoelectric detection performance Bi1-xHoxFeO3 photodetector is realized by doping Ho. The responsivity (R) detectivity (D*) can reach 0.0159 A/W 1.94 × 1011 Jones under monochromatic light with wavelength 900 nm. Meanwhile, R D* 0.022 2.65 sunlight. These excellent photodetection performances are attributed to short-circuit current (Jsc). When Ho content 6%, reaches up 0.81 mA/cm2. systematic structure photo-electric characteristic analysis suggest that decrease band gap leads generation larger while polarization reduced slightly. This work provides new way obtain high-performance