Broadband Photodetector Based on In₂S₃/InAs/In₂S₃ Heterostructure for Artificial Vision

As biomimetic neuromorphic computing gains increasing research interest, optoelectronic synapses have emerged as particularly noteworthy due to their ability to perform in-sensor computations. This study presents an optoelectronic synapse array based on In<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>S<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub>/InAs/In<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>S<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> heterostructure, which can detect and respond across a wide spectral range from ultraviolet (UV) to near-infrared (NIR). These arrays replicate the functionality of biological photoreceptors, offering improved spectral sensitivity and selectivity, which are crucial for artificial vision applications. The In<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>S<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub>/InAs/In<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>S<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> heterostructure studied demonstrates wide spectral response, synaptic plasticity, low cost, and ease of array integration, highlighting its significant potential for applications in neuromorphic computing and biomimetic vision.