Ultrabroadband Photodetectors up to 10.6 µm Based on 2D Fe<sub>3</sub> O<sub>4</sub> Nanosheets.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32406177.
- Also identified by DOI 10.1002/adma.202002237.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The ultrabroadband spectrum detection from ultraviolet (UV) to long-wavelength infrared (LWIR) is promising for diversified optoelectronic applications of imaging, sensing, and communication. However, the current LWIR-detecting devices suffer from low photoresponsivity, high cost, and cryogenic environment. Herein, a high-performance ultrabroadband photodetector is demonstrated with detecting range from UV to LWIR based on air-stable nonlayered ultrathin Fe<sub>3</sub> O<sub>4</sub> nanosheets synthesized via a space-confined chemical vapor deposition (CVD) method. Ultrahigh photoresponsivity (R) of 561.2 A W<sup>-1</sup> , external quantum efficiency (EQE) of 6.6 × 10<sup>3</sup> %, and detectivity (D*) of 7.42 × 10<sup>8</sup> Jones are achieved at the wavelength of 10.6 µm. The multimechanism synergistic effect of photoconductive effect and bolometric effect demonstrates the high sensitivity for light with any light intensities. The outstanding device performance and complementary mixing photoresponse mechanisms open up new potential applications of nonlayered 2D materials for future infrared optoelectronic devices.