光电探测器
响应度
材料科学
光电子学
光电效应
异质结
热电性
硅
比探测率
极化(电化学)
光学
物理
电介质
铁电性
物理化学
化学
作者
Ribwar Ahmadi,Amin Abnavi,Hamidreza Ghanbari,Hadi Mohandes,Mohammadreza Mohammadzadeh,Thushani De Silva,Amirhossein Hasani,Mirette Fawzy,Fahmid Kabir,Michael M. Adachi
出处
期刊:Nano Energy
[Elsevier]
日期:2022-07-01
卷期号:98: 107285-107285
被引量:22
标识
DOI:10.1016/j.nanoen.2022.107285
摘要
The coupling of pyroelectric and photoelectric effects is a new method to enhance transient response while maintaining steady-state response in photodetectors. Such photodetectors have recently attracted a great attention due to a wide range of potential applications including artificial electronic eyes, neuromorphic computing, color sensors, and optical communications. Here, we report a photodetector based on the pyroelectricity and photoelectricity effect in a silicon-water heterojunction for the first time. Facilitated by the polarity of water on the Si surface, this heterostructure serves as a pyroelectric-based photodetector with a responsivity as high as 754 mA/W and specific detectivity as high as 1.33 × 1013 Jones under a light wavelength of 400 nm at zero bias. Also, the formation of a built-in electric field at the silicon-water interface results in a photoelectric-based photodetector with a responsivity as high as 12.3 A/W and an ultrahigh detectivity of 2.18 × 1014 Jones at −2 V bias under steady-state conditions. Moreover, due to the polarization-sensitive reflection of light on the water surface, this structure is also polarization-sensitive. These photodetectors are suitable for liquid-compatible applications that require broadband detection, high responsivity, and polarization-sensitivity.
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