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Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices

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Ionic Photovoltaics-in-Memory in van der Waals Material.

Dongyan Li¹, Zexin Li¹, Chen Pan²

¹State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|July 23, 2024

Summary

A novel ionic photovoltaic effect in CdSb2Se3Br2 overcomes limitations of traditional photovoltaic devices. This discovery enables nonvolatile photocurrent switching and secure circuits, advancing optoelectronics and in-memory computing.

Keywords:

2D materials CdSb2Se3Br2 in‐memory computing optoelectronic logic devices photovoltaics

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Published on: May 13, 2020

Area of Science:

Optoelectronics
Materials Science
Solid-State Physics

Background:

Photovoltaic effects are crucial in optoelectronics but face limitations like strict band-alignment requirements and lack of multifunctional properties.
Existing photovoltaic technologies struggle with reconfiguration and nonvolatility, hindering advanced applications.

Purpose of the Study:

To demonstrate a novel ionic photovoltaic effect in centrosymmetric CdSb2Se3Br2.
To overcome the limitations of conventional photovoltaic effects and explore multifunctional properties.
To develop a new material platform for in-memory sensing and computing devices.

Main Methods:

Investigation of the ionic photovoltaic effect in centrosymmetric CdSb2Se3Br2.
Characterization of photocurrent anisotropy along CdBr2 chains.
Demonstration of electrically-induced nonvolatile photocurrent switching.
Implementation of a secure circuit utilizing the unique photovoltaic properties.

Main Results:

A novel ionic photovoltaic effect was observed in CdSb2Se3Br2, overcoming previous limitations.
Significant photocurrent anisotropy was detected, being prominent along CdBr2 chains.
Electrically-induced nonvolatile photocurrent switching was successfully demonstrated.
A highly secure circuit with electrical and optical keys was implemented.

Conclusions:

The ionic photovoltaic effect in CdSb2Se3Br2 offers a new mechanism for photovoltaic devices.
The material's properties enable nonvolatile switching and secure circuit applications.
This research provides a promising material platform for advanced in-memory sensing and computing.