Temperature programmable neuromorphic devices based on lead sulfide colloidal quantum dots and applications

By using a single-layer thin film based on lead sulfide colloidal quantum dots and a temperature control module, the problems of fixed response time and complex structure of optoelectronic neuromorphic devices were solved. The programmable adjustment of the response time of the device at different temperatures was realized, which can adapt to multi-scale timing information processing, reduce energy consumption and simplify the process.

CN122389964APending Publication Date: 2026-07-14BEIJING INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INST OF TECH
Filing Date
2026-04-17
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing optoelectronic neuromorphic devices have a fixed response time scale, making it difficult to achieve reversible switching between rapid detection and long-term storage modes on the same hardware platform through simple external control methods. Furthermore, their reliance on multilayer heterogeneous structures leads to high process complexity, making it impossible to fully utilize ambient temperature to control the release process of carrier trap states.

Method used

By employing a single-layer thin-film structure based on lead sulfide colloidal quantum dots and combining it with a temperature control module, the release dynamics of trapped state charges can be controlled by switching the device operating temperature within the range of 120 K to 290 K, thereby achieving programmable adjustment of the device response time.

Benefits of technology

It enables the switchable operation of the same device between fast response and long-term hold under different application requirements, simplifies the device structure, reduces energy consumption, and adapts to the needs of multi-scale timing information processing.

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Abstract

The application belongs to the technical field of neuromorphic computing devices, and particularly relates to a temperature programmable neuromorphic device based on lead sulfide colloidal quantum dots and application. The device comprises an insulating substrate, a planar gap electrode, a lead sulfide colloidal quantum dot photosensitive film and a temperature control module. By setting the working temperature to control the release kinetics of the trap state charge in the photosensitive film, the device has different photocurrent decay characteristics at different temperatures, realizing reversible switching of the fast detection and long-term storage modes. The device can be used for reservoir computing, and realizes time sequence information processing through the historical dependence response to time sequence light pulses. The application solves the problem of fixed and unadjustable response time scale of the existing device, and has the advantages of simple structure, good process compatibility and wide response dynamic range.
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