Ion migration induced bipolar diode effect and ferroelectricity modulation in CuInP2S6

Dongke Rong; Cheng Tian; Jie Xing; Qiao Jin; Fangyuan Ma; Guozhen Liu; Jie Qiu; Changchun Zhao; Huiying Hao; Jingjing Dong; Hao Liu; Youguo Shi; Er Jia Guo

doi:10.1063/5.0149867

Ion migration induced bipolar diode effect and ferroelectricity modulation in CuInP₂S₆

Dongke Rong, Cheng Tian, Jie Xing, Qiao Jin, Fangyuan Ma, Guozhen Liu, Jie Qiu, Changchun Zhao, Huiying Hao, Jingjing Dong, Hao Liu, Youguo Shi, Er Jia Guo

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The coupling between ferroelectricity and ion conductivity always presents unique physical and chemical properties, making it crucial to understand their correlation for the development of advanced functional devices. CuInP₂S₆ (CIPS), a van der Waals “ferroionic” material, serves as an excellent platform to investigate their intercoupling. In this study, we observe a bipolar diode-like rectification behavior in a vertical Pt/CIPS/In capacitor by controlling the migration of Cu ions. The non-uniform distribution of mobile Cu ions is coupled with ferroelectricity, resulting in a switchable imprint field and an enhanced saturation polarization about 12 μC/cm² in CIPS. Additionally, CIPS exhibits a significant photovoltaic response due to its robust built-in electric field caused by the unbalanced distribution of Cu ions. This work demonstrates a controllable Cu ions migration and its manipulation on the electrical transport and ferroelectricity in CIPS. The dynamically tunable bipolar diode effect, closely coupled with ferroelectricity in CIPS, has promising prospects in self-powered photodetectors, memristors, and neuromorphic computing.

Original language	English
Article number	181902
Journal	Applied Physics Letters
Volume	122
Issue number	18
DOIs	https://doi.org/10.1063/5.0149867
State	Published - May 1 2023
Externally published	Yes

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11974318 and 12074282).

Funders	Funder number
National Natural Science Foundation of China	12074282, 11974318

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1063/5.0149867

Cite this

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title = "Ion migration induced bipolar diode effect and ferroelectricity modulation in CuInP2S6",

abstract = "The coupling between ferroelectricity and ion conductivity always presents unique physical and chemical properties, making it crucial to understand their correlation for the development of advanced functional devices. CuInP2S6 (CIPS), a van der Waals “ferroionic” material, serves as an excellent platform to investigate their intercoupling. In this study, we observe a bipolar diode-like rectification behavior in a vertical Pt/CIPS/In capacitor by controlling the migration of Cu ions. The non-uniform distribution of mobile Cu ions is coupled with ferroelectricity, resulting in a switchable imprint field and an enhanced saturation polarization about 12 μC/cm2 in CIPS. Additionally, CIPS exhibits a significant photovoltaic response due to its robust built-in electric field caused by the unbalanced distribution of Cu ions. This work demonstrates a controllable Cu ions migration and its manipulation on the electrical transport and ferroelectricity in CIPS. The dynamically tunable bipolar diode effect, closely coupled with ferroelectricity in CIPS, has promising prospects in self-powered photodetectors, memristors, and neuromorphic computing.",

author = "Dongke Rong and Cheng Tian and Jie Xing and Qiao Jin and Fangyuan Ma and Guozhen Liu and Jie Qiu and Changchun Zhao and Huiying Hao and Jingjing Dong and Hao Liu and Youguo Shi and Guo, {Er Jia}",

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doi = "10.1063/5.0149867",

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T1 - Ion migration induced bipolar diode effect and ferroelectricity modulation in CuInP2S6

AU - Rong, Dongke

AU - Tian, Cheng

AU - Xing, Jie

AU - Jin, Qiao

AU - Ma, Fangyuan

AU - Liu, Guozhen

AU - Qiu, Jie

AU - Zhao, Changchun

AU - Hao, Huiying

AU - Dong, Jingjing

AU - Liu, Hao

AU - Shi, Youguo

AU - Guo, Er Jia

PY - 2023/5/1

Y1 - 2023/5/1

N2 - The coupling between ferroelectricity and ion conductivity always presents unique physical and chemical properties, making it crucial to understand their correlation for the development of advanced functional devices. CuInP2S6 (CIPS), a van der Waals “ferroionic” material, serves as an excellent platform to investigate their intercoupling. In this study, we observe a bipolar diode-like rectification behavior in a vertical Pt/CIPS/In capacitor by controlling the migration of Cu ions. The non-uniform distribution of mobile Cu ions is coupled with ferroelectricity, resulting in a switchable imprint field and an enhanced saturation polarization about 12 μC/cm2 in CIPS. Additionally, CIPS exhibits a significant photovoltaic response due to its robust built-in electric field caused by the unbalanced distribution of Cu ions. This work demonstrates a controllable Cu ions migration and its manipulation on the electrical transport and ferroelectricity in CIPS. The dynamically tunable bipolar diode effect, closely coupled with ferroelectricity in CIPS, has promising prospects in self-powered photodetectors, memristors, and neuromorphic computing.

AB - The coupling between ferroelectricity and ion conductivity always presents unique physical and chemical properties, making it crucial to understand their correlation for the development of advanced functional devices. CuInP2S6 (CIPS), a van der Waals “ferroionic” material, serves as an excellent platform to investigate their intercoupling. In this study, we observe a bipolar diode-like rectification behavior in a vertical Pt/CIPS/In capacitor by controlling the migration of Cu ions. The non-uniform distribution of mobile Cu ions is coupled with ferroelectricity, resulting in a switchable imprint field and an enhanced saturation polarization about 12 μC/cm2 in CIPS. Additionally, CIPS exhibits a significant photovoltaic response due to its robust built-in electric field caused by the unbalanced distribution of Cu ions. This work demonstrates a controllable Cu ions migration and its manipulation on the electrical transport and ferroelectricity in CIPS. The dynamically tunable bipolar diode effect, closely coupled with ferroelectricity in CIPS, has promising prospects in self-powered photodetectors, memristors, and neuromorphic computing.

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