AI Article Synopsis
- Advanced materials for photodetectors are sought after for their wide spectral response, high sensitivity, and stable operation in various applications like imaging and sensing.
- A new ultra-broadband photodetector utilizing an ultrathin 2D FeO nanoflake heterostructure has been developed, which operates effectively from visible light (405 nm) to long-wave infrared (LWIR, 10.6 μm) at room temperature.
- The device demonstrates impressive performance metrics, including high photoresponsivity (182.8 A/W), rapid response times, and strong LWIR detection, suggesting potential for future infrared optoelectronic technology using ultrathin materials.
Article Abstract
Photodetectors based on advanced materials with a broad spectral photoresponse, high sensitivity, huge integration ability, room-temperature operation, and stable environmental stability are highly desired for diversified applications of imaging, sensing, and communication. Herein, a high-performance ultra-broadband photodetector based on an ultrathin two-dimensional (2D) FeO nanoflake heterostructure with high sensitivity was designed. The photodetector response light was from visible 405 nm to long-wave infrared (LWIR) 10.6 μm in ambient air. The competitive performances, including a high photoresponsivity () of 182.8 A W, fast speed with the rise time τ = 8.8 μs, and decay time τ = 4.1 μs, were demonstrated in the visible range. Notably, the device exhibits an excellent uncooled LWIR detection ability, with a high of 1.4 A W realized at a 1.5 V bias. In the full spectral range, the noise equivalent power is lower than 0.79 pW Hz, and specific detectivity (*) is higher than 4.9 × 10 cm Hz W in ambient air. This work provides alternative ultrathin 2D materials for future infrared optoelectronic devices.
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| http://dx.doi.org/10.1021/acsami.4c10952 | DOI Listing |
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