文献类型：期刊文献

英文题名：Molecular-Potential and Redox Coregulated Cathodic Electrosynthesis toward Ionic Azulene-Based Thin Films for Organic Memristors

作者：Zhang, Qiongshan[1,2];Wu, Dongchuang[3];Fu, Yubin[4,5];Li, Jinyong[1,2];Chen, Yu[1,2];Zhang, Bin[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat & Joint Int Res, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]North Univ China, Sch Energy & Power Engn, Taiyuan 030051, Peoples R China;[4]Tech Univ Dresden, Ctr Adv Elect Dresden cfaed, D-01062 Dresden, Germany;[5]Tech Univ Dresden, Dept Chem & Food Chem, D-01062 Dresden, Germany

年份：2024

卷号：16

期号：17

起止页码：22217

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20241715981685);WOS:【SCI-EXPANDED(收录号:WOS:001241927900001)】；

基金：The authors acknowledge the financial supports from the National Natural Science Foundation of China (51973061 and 51961145402), Shanghai Rising-Star Program (21QA1402100), and the National Natural Science Foundation of Shanghai (23ZR1416900).

语种：英文

外文关键词：organic memristors; cathodic electropolymerization; azulene; biosynapticfunctions; Al conductivefilaments

摘要：Organic memristors as promising electronic units are attracting significant attention owing to their simplicity of molecular structure design. However, fabricating high-quality organic films via novel synthetic technologies and exploring unprecedented chemical structures to achieve excellent memory performance in organic memristor devices are highly challenging. In this work, we report a cathodic electropolymerization to synthesize an ionic azulene-based memristive film (PPMAz-Py+Br-) under the molecular-potential and redox coregulation. During the cathodic electropolymerization process, electropositive pyridinium salts migrate to the cathode under an electric field, undergo a reduction-coupling deprotonation reaction, and polymerize into a uniform film with a controllable thickness on the electrode surface. The prepared Al/PPMAz-Py+Br-/ITO devices not only exhibit a high ON/OFF ratio of 1.8 x 10(3), high stability, long memory retention, and endurance under a wide range of voltage scans, but also achieve excellent multilevel storage and history-dependent memristive performance. In addition, the devices can mimic important biosynaptic functions, such as learning/forgetting function, synaptic enhancement/inhibition, paired-pulse facilitation/depression, and spiking-rate-dependent plasticity. The tunable memristive performances are attributed to the capture of free electrons on pyridinium cations, the migration of the aluminum ions (Al3+), and the form of Al conductive filaments under voltage scans.