A low-power biomimetic collision detector based on an in-memory molybdenum disulfide photodetector

Jayachandran, Darsith; Oberoi, Aaryan; Sebastian, Amritanand; Choudhury, Tanushree H.; Shankar, Balakrishnan; Redwing, Joan M.; Das, Saptarshi

doi:10.1038/s41928-020-00466-9

Cited by 179 publications

(165 citation statements)

References 51 publications

Supporting

Mentioning

164

Contrasting

Order By: Relevance

“…[ 7–10 ] Since the discovery of graphene by Geim et al, [ 11 ] the family of 2D materials has drawn great attention for their favorable applications in modern electronic and optoelectronic devices. [ 12–17 ] In general, 2D materials possess unique and unconventional properties such as strong light–matter interaction, tunable optical absorption, and outstanding carrier transport and thus, are expected to be one of the most potential substitute materials to compensate the limitation of traditional semiconductors. [ 18 ]…”

Section: Introductionmentioning

confidence: 99%

Band Alignment Engineering in Two‐Dimensional Transition Metal Dichalcogenide‐Based Heterostructures for Photodetectors

et al. 2020

View full text Add to dashboard Cite

The hybridization of two‐dimensional transition metal dichalcogenides (2D TMDs) with other light‐sensitive materials to fabricate the TMD‐based heterostructures is an effective way to boost the overall photoelectric performance of photodetectors. In particular, the alignment of band structure at the interface of the binding materials plays a critical role in optimizing the carrier transfer path and prompting the charge separation rate, which finally lead to the simultaneous improvement of photoresponsivity and response rate and the expansion of detection range. However, the band alignment engineering topic has been barely summarized and reviewed in detail up to today. Herein, a specific review focused on the band alignment strategies and the related charge‐transfer mechanism of the recently developed novel TMD heterostructures for photodetectors is provided. The band structures are classified into four categories according to the targeted function of photodetectors, including that formed by TMDs with zero‐bandgap materials, narrow‐bandgap semiconductors, middle‐bandgap semiconductors, and wide‐bandgap semiconductors. The corresponding band alignment principles and charge‐transfer behaviors are summarized carefully by providing various latest research works as representative examples under each category. Herein, a key reference for applying and extending the fundamental band alignment principles in the design and fabrication of future TMD‐based heterostructural photodetectors is provided.

show abstract

Section: Introductionmentioning

confidence: 99%

Band Alignment Engineering in Two‐Dimensional Transition Metal Dichalcogenide‐Based Heterostructures for Photodetectors

et al. 2020

View full text Add to dashboard Cite

show abstract

“…IoT sensors will be deployed. The phototransduction mechanism in MoS2 PD is extensively studied in the literature including our previous reports and can be ascribed to a combination of photocarrier generation in the MoS2 channel as well as photogating effect arising due to charge trapping/detrapping at the MoS2/gate-dielectric interface [21]. and post-synaptic current ( ) measured at the drain terminal with a drain bias, = 1 V. The encoding threshold was programmed to be = 1.5 V, such that the presynaptic voltage pulses ( ) obtained from the MoS2 WGNA ( Fig.…”

Section: The Device Can Be Programmed To Any Desired Conductance Statmentioning

confidence: 99%

A Low-Power Biomimetic Crypto Engine for All-In-One IoT based on Programmable and Multifunctional MoS2 FETs

Dodda

Das

2020

Preprint

Self Cite

View full text Add to dashboard Cite

In the emerging era of internet of things (IoT), ubiquitous sensors continuously collect, consume, store, and communicate an astonishing volume of information, which are becoming increasingly vulnerable to theft and misuse. Modern software crypto systems are powerful but require extensive computational infrastructure for implementing ciphering algorithms making it difficult to be adopted by IoT edge sensors that operate with limited hardware resources and at miniscule energy budgets. Here we propose, and experimentally demonstrate a low-power, biomimetic, crypto system integrated with IoT edge sensor based on an array of atomically thin, multifunctional, and programmable MoS2 field effect transistors (FETs). We show that the information received by a MoS2 photodetector and encrypted by a population of MoS2 based reconfigurable artificial neural encoders is secure from an eavesdropper with finite resources. We also show that our all-in-one IoT platform consumes miniscule energy in the range of tens to hundreds of pico Joules, has a small hardware footprint, and combines sensing, non-volatile storage, and security, for the first time.

show abstract

“…[12] More recently, Das and co-workers reported the low-power solid-state collision detector based on monolayer MoS 2 with a back-gate memory stack, which mimics the response of the lobula giant movement detector neuron found in locusts. [13] Moreover, photonic-synapse transistors, which are based on carbon nanotubes, black phosphorus, have been demonstrated to have the potential benefits of low power Optoelectronic-neuromorphic transistors are vital for next-generation nanoscale brain-like computational systems. However, the hardware implementation of optoelectronic-neuromorphic devices, which are based on conventional transistor architecture, faces serious challenges with respect to the synchronous processing of photoelectric information.…”

Section: Doi: 101002/smll202005217mentioning

confidence: 99%

Vertical 0D‐Perovskite/2D‐MoS₂ van der Waals Heterojunction Phototransistor for Emulating Photoelectric‐Synergistically Classical Pavlovian Conditioning and Neural Coding Dynamics

Cheng

Liu

et al. 2020

Small

108

View full text Add to dashboard Cite

Optoelectronic‐neuromorphic transistors are vital for next‐generation nanoscale brain‐like computational systems. However, the hardware implementation of optoelectronic‐neuromorphic devices, which are based on conventional transistor architecture, faces serious challenges with respect to the synchronous processing of photoelectric information. This is because mono‐semiconductor material cannot absorb adequate light to ensure efficient light–matter interactions. In this work, a novel neuromorphic‐photoelectric device of vertical van der Waals heterojunction phototransistors based on a colloidal 0D‐CsPbBr3‐quantum‐dots/2D‐MoS2 heterojunction channel is proposed using a polymer ion gel electrolyte as the gate dielectric. A highly efficient photocarrier transport interface is established by introducing colloidal perovskite quantum dots with excellent light absorption capabilities on the 2D‐layered MoS2 semiconductor with strong carrier transport abilities. The device exhibits not only high photoresponsivity but also fundamental synaptic characteristics, such as excitatory postsynaptic current, paired‐pulse facilitation, dynamic temporal filter, and light‐tunable synaptic plasticity. More importantly, efficiency‐adjustable photoelectronic Pavlovian conditioning and photoelectronic hybrid neuronal coding behaviors can be successfully implemented using the optical and electrical synergy approach. The results suggest that the proposed device has potential for applications associated with next‐generation brain‐like photoelectronic human–computer interactions and cognitive systems.

show abstract

A low-power biomimetic collision detector based on an in-memory molybdenum disulfide photodetector

Cited by 179 publications

References 51 publications

Band Alignment Engineering in Two‐Dimensional Transition Metal Dichalcogenide‐Based Heterostructures for Photodetectors

Band Alignment Engineering in Two‐Dimensional Transition Metal Dichalcogenide‐Based Heterostructures for Photodetectors

A Low-Power Biomimetic Crypto Engine for All-In-One IoT based on Programmable and Multifunctional MoS2 FETs

Vertical 0D‐Perovskite/2D‐MoS₂ van der Waals Heterojunction Phototransistor for Emulating Photoelectric‐Synergistically Classical Pavlovian Conditioning and Neural Coding Dynamics

Contact Info

Product

Resources

About

A low-power biomimetic collision detector based on an in-memory molybdenum disulfide photodetector

Cited by 179 publications

References 51 publications

Band Alignment Engineering in Two‐Dimensional Transition Metal Dichalcogenide‐Based Heterostructures for Photodetectors

Band Alignment Engineering in Two‐Dimensional Transition Metal Dichalcogenide‐Based Heterostructures for Photodetectors

A Low-Power Biomimetic Crypto Engine for All-In-One IoT based on Programmable and Multifunctional MoS2 FETs

Vertical 0D‐Perovskite/2D‐MoS2 van der Waals Heterojunction Phototransistor for Emulating Photoelectric‐Synergistically Classical Pavlovian Conditioning and Neural Coding Dynamics

Contact Info

Product

Resources

About

Vertical 0D‐Perovskite/2D‐MoS₂ van der Waals Heterojunction Phototransistor for Emulating Photoelectric‐Synergistically Classical Pavlovian Conditioning and Neural Coding Dynamics