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WSe2-Based Multifunctional Optoelectronic Device for Processing Circuits (MOD-PC)
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DOI：10.1002/adfm.202507587.png)
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Abstract
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This study reports a WSe2 based two-terminal, all-in-one semiconductor device, acronym as Multifunctional Optoelectronic Device for Processing Circuits (MOD-PC) realizing analog, digital, and mixed-signal processing blocks within a single cell and eliminating the dependency on Complementary Metal-Oxide Semiconductor (CMOS) counterparts for neuromorphic computing applications. 2D-Material based photodetectors are fabricated exhibiting a high detectivity upto 2.5x 1011 Jones and 0.92 A W-1 responsivity with scaled cross-sectional area. Moreover, the opto-electric signal processing circuits are experimentally demonstrated, e.g., Analog Optoelectronic-Synapse (O-Synapse), Digital Optoelectronic Logic (O-Logic) [AND, OR logic] gates, and a novel Optoelectronic Digital-to-Analog Converter (O-DAC) circuit. To the best of the authors' knowledge, this is the first study to truly demonstrate analog, digital, and mixed-signal circuit applications within a single two terminal based mechanically exfoliated optoelectronic homostructure device. Furthermore, all-above functionalities are implemented within a single two terminal photodetector, even without modifying electrical schematic or no additional components requirement, thus overcoming area bottlenecks. The electro-optic enabled 3-bit O-DAC circuit exhibits even upto 52x device count reduction (thus the area savings) and approximate to 13.2 x 106 x power efficiency in-contrast to the CMOS/ BiCMOS/ GaN-HEMT based counterparts. Moreover, proposed O-Logic gates demonstrate 4x to 6x area and >= 24x electrical energy savings as compared to conventional CMOS/ emerging technologies based designs.
Keywords:
2D-materials
multifunctional devices
neuromorphic computing
neuromorphic hardware
optoelectronic devices
photodetectors
optoelectronic processors
Journal
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19
Papers:
3.5W
Citations:
32.1W
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