材料科学
光电探测器
碲
宽带
光电子学
红外线的
光子学
半导体
带隙
纳米棒
吸收(声学)
光学
纳米技术
物理
冶金
复合材料
作者
Mingcong Zhang,Yunjie Liu,Fuhai Guo,Chao Zhang,Bing Hu,Siqi Li,Weizhuo Yu,Lanzhong Hao
标识
DOI:10.1021/acsami.3c17933
摘要
Mid- and far-infrared photodetectors that can operate at room temperature are essential for both civil and military applications. However, the widespread use of mid-to-far-infrared photonic technology faces challenges due to the need for low-temperature cooling of existing commercial semiconductors and the limited optical absorption efficiency of two-dimensional materials. We have utilized the photothermoelectric effect to fabricate a self-powered, broadband, and high-performance photodetector based on a one-dimensional tellurium nanorod array film. The device surpasses energy band gap limitations, functioning even at wavelengths up to approximately 10,600 nm. In particular, the detectivity of the device can reach 4.8 × 109 Jones at 4060 nm under room-temperature conditions, which is an order of magnitude higher than that of commercially available photodetectors. It demonstrates fast response and recovery times of 8.3 and 8.8 ms. Furthermore, the device demonstrates outstanding flexibility withstanding over 300 bending cycles and environmental stability. These results suggest a viable approach for designing and developing high-performance, room-temperature, wearable optoelectronic devices.
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