Performance-Tunable MoS $_{\text{2}}$ Homojunction Photodiode Based on Different Built-In Electric Field
IEEE Transactions on Electron Devices(2024)
摘要
In traditional silicon-based semiconductor manufacturing, diodes with rectifier function are the basis of various electronic devices, and it can be typically achieved through a doping process with ion implantation of the group III–V elements. However, for 2-D semiconductors, such as MoS
$_{\text{2}}$
, the ultrathin thickness of their channel layer makes it challenging to employ ion implantation techniques for the fabrication of diodes. Here, we fabricated a performance-tunable MoS
$_{\text{2}}$
homojunction photodiode without the need for external element doping process. By applying different gate voltages, the built-in electric field at the homo-interface can be adjusted, endowing the device with p-n-junction-like characteristics, thereby achieving a tunable rectification ratio (RR) (from 10
$^{\text{3}}$
to 2). In addition, outstanding photovoltaic effect is achieved at a wavelength of 532 nm, including a high responsivity of up to 191 mA/W and a high-specific detectivity of up to approximately 4.5
$\times$
10
$^{\text{10}}$
Jones. This research is of significant importance in the field of 2-D optoelectronic devices, providing new design ideas and fabrication methods for high-performance 2-D photodiodes.
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关键词
Built-in electric field,homojunction,MoS $_{\text{2}}$,performance-tunable,photodiode
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