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Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

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Published on: June 23, 2018

Organic High-Temperature Synaptic Phototransistors for Energy-Efficient Neuromorphic Computing.

Ziyi Guo¹, Junyao Zhang¹, Ben Yang¹

¹School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|December 15, 2023

Summary

High-temperature synaptic phototransistors (HTSPs) demonstrate stable operation up to 220°C, enabling reliable neuromorphic computing in extreme conditions. These devices offer energy-efficient, flexible solutions for advanced wearable electronics.

Keywords:

energy‐efficient high temperatures neuromorphic computing organic materials synaptic phototransistors

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Area of Science:

Organic electronics
Neuromorphic computing
Materials science

Background:

Organic optoelectronic synaptic devices are crucial for biomedical and robotic applications but face thermal instability challenges.
Conventional organic materials degrade at high temperatures, limiting device performance and operational range.

Purpose of the Study:

To develop organic synaptic devices capable of reliable operation in high-temperature environments (above 121°C).
To address the limitations of thermal instability and photoresponse degradation in organic optoelectronic devices.

Main Methods:

Fabrication of high-temperature synaptic phototransistors (HTSPs) using thermally stable semiconductor polymer blends.
Testing of HTSPs across a wide temperature range (room temperature to 220°C) and under accelerated aging conditions (750 h of double 85 testing).
Evaluation of HTSPs for optical decoding and object recognition tasks at elevated temperatures.

Main Results:

HTSPs successfully simulated optical-modulated synaptic characteristics from room temperature up to 220°C.
Devices exhibited robust optoelectronic performance and enhanced operational reliability, even after prolonged high-temperature exposure.
Demonstrated ultralow power consumption (12.3 aJ/event) in flexible HTSPs at a low operating voltage (-0.05 mV).

Conclusions:

The developed HTSPs overcome the thermal instability limitations of conventional organic materials for synaptic devices.
This research provides a pathway for high-temperature, energy-efficient wearable optoelectronic devices for neuromorphic computing.
The findings enable reliable optical-modulated neuromorphic applications in demanding environments.