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Liu S, He Z, Zhang B, Zhong X, Guo B, Chen W, Duan H, Tong Y, He H, Chen Y, Liu G. Approaching the Zero-Power Operating Limit in a Self-Coordinated Organic Protonic Synapse. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2305075. [PMID: 37870184 DOI: 10.1002/advs.202305075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/27/2023] [Indexed: 10/24/2023]
Abstract
High-performance artificial synapse with nonvolatile memory and low power consumption is a perfect candidate for brainoid intelligence. Unfortunately, due to the energy barrier paradox between ultra-low power and nonvolatile modulation of device conductances, it is still a challenge at the moment to construct such ideal synapses. Herein, a proton-reservoir type 4,4',4″,4'''-(Porphine-5,10,15,20-tetrayl) tetrakis (benzenesulfonic acid) (TPPS) molecule and fabricated organic protonic memristors with device width of 10 µm to 100 nm is synthesized. The occurrence of sequential proton migration and interfacial self-coordinated doping will introduce new energy levels into the molecular bandgap, resulting in effective and nonvolatile modulation of device conductance over 64 continuous states with retention exceeding 30 min. The power consumptions of modulating and reading the device conductance approach the zero-power operating limits, which range from 16.25 pW to 2.06 nW and 6.5 fW to 0.83 pW, respectively. Finally, a robust artificial synapse is successfully demonstrated, showing spiking-rate-dependent plasticity (SRDP) and spiking-timing-dependent plasticity (STDP) characteristics with ultra-low power of 0.66 to 0.82 pW, as well as 100 long-term depression (LTD)/potentiation (LTP) cycles with 0.14%/0.30% weight variations.
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Affiliation(s)
- Shuzhi Liu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhilong He
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Bin Zhang
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiaolong Zhong
- Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Bingjie Guo
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Weilin Chen
- Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hongxiao Duan
- Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yi Tong
- Suzhou Laboratory, Suzhou, 215000, China
| | - Haidong He
- Minhang Hospital, Fudan University, 170 Xinsong Road, Shanghai, 201199, China
| | - Yu Chen
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Gang Liu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
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Zhao X, Qiu X, Xue H, Liu S, Liang D, Yan C, Chen W, Wang Y, Zhou G. Conjugated and Non-conjugated Polymers Containing Two-Electron Redox Dihydrophenazines for Lithium-Organic Batteries. Angew Chem Int Ed Engl 2023; 62:e202216713. [PMID: 36515468 DOI: 10.1002/anie.202216713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/15/2022]
Abstract
Organic p-type cathode materials have recently attracted increasing attention due to their higher redox potentials and rate capabilities in comparison to n-type cathodes. However, most of the p-type cathodes based on one-electron redox still suffer from limited stability and low specific capacity (<150 mAh g-1 ). Herein, two polymers, conjugated poly(diethyldihydrophenazine vinylene) (CPP) and non-conjugated poly(diethyldihydrophenazine ethylidene) (NCPP) containing two-electron redox dihydrophenazine, have been developed as p-type cathode materials. It is experimentally and theoretically found that the conjugated linkage among the redox centers in polymer CPP is more favorable for the effective charge delocalization on the conjugated polymer backbone and the sufficient oxidation in the higher potential region (3.3-4.2 V vs. Li/Li+ ). Consequently, the CPP cathode displays a higher reversible specific capacity of 184 mAh g-1 with excellent cycling stability.
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Affiliation(s)
- Xiang Zhao
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
| | - Xuan Qiu
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Haodong Xue
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
| | - Si Liu
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
| | - Dingli Liang
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
| | - Chuan Yan
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
| | - Weinan Chen
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
| | - Yonggang Wang
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Gang Zhou
- Lab of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200438, China
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Surface hardness and abrasion resistance natures of thermoplastic polymer covers and windows and their enhancements with curable tetraacrylate coating. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ryu W, Xiang L, Jin KS, Kim HJ, Kim HC, Ree M. Newly Found Digital Memory Characteristics of Pyrrolidone- and Succinimide-Based Polymers. Macromol Rapid Commun 2021; 42:e2100186. [PMID: 33987942 DOI: 10.1002/marc.202100186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/27/2021] [Indexed: 11/10/2022]
Abstract
This study reports for the first time the excellent nonvolatile and volatile digital memory characteristics of polymers bearing 2-pyrrolidone and succinimide moieties. A series of new polymers is synthesized from poly(ethylene-alt-maleic anhydride) and four alcohol derivatives with and without 2-pyrrolidone and succinimide moieties. All polymers, including polyvinylpyrrolidone, are found to be thermally stable up to 195 °C or higher, and characterized regarding their molecular orbital energy levels, bandgap, and resistive digital memory behaviors. Excitingly, the polymers bearing either 2-pyrrolidone or succinimide moiety demonstrate p-type digital memory behaviors with high ON/OFF current ratios and long reliabilities. Nonvolatile digital memory performance is achieved over the film thickness range of 10-80 nm, whereas volatile digital memory is demonstrated over a much narrower range of film thickness. All digital memory performances can be originated from the 2-pyrrolidone and succinimide moieties possessing high affinity and stabilization power to charges via charge traps and transformations based on a hopping conduction process. Hence, these new polymers are suitable for the production of high-performance p-type nonvolatile and volatile digital memory devices. Moreover, 2-pyrrolidone and succinimide can be used as new and economical electroactive building blocks for the development of advanced digital memory materials.
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Affiliation(s)
- Wonyeong Ryu
- Division of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Li Xiang
- Division of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Kyeong Sik Jin
- PLS-II Beamline Division, Pohang Accelerator Laboratory, Pohang, 37673, Republic of Korea
| | - Hyun-Joong Kim
- Ceko Corporation, Surface Technology Institute, 519 Dunchon-daero, Jungwon-gu, Seongnam, 13216, Republic of Korea
| | - Hong-Chul Kim
- Ceko Corporation, Surface Technology Institute, 519 Dunchon-daero, Jungwon-gu, Seongnam, 13216, Republic of Korea
| | - Moonhor Ree
- Ceko Corporation, Surface Technology Institute, 519 Dunchon-daero, Jungwon-gu, Seongnam, 13216, Republic of Korea
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