| Title: | Enhancing the Resistive Switching Behavior of WORM Memory Devices Using D-pi-A Based Ester-Flanked Quinolines |
| Author(s): | Angela VM; Harshini D; Anjali A; Imran PM; Bhuvanesh NSP; Nagarajan S; |
| Address: | "Organic Electronics Division, Department of Chemistry, Central University of Tamil Nadu, Thiruvarur, 610 005, India. Department of Chemistry, Islamiah College, Vaniyambadi, 635 752, India. Department of Chemistry, Texas A&M University, College Station, TX, 77842, USA" |
| ISSN/ISBN: | 1521-3765 (Electronic) 0947-6539 (Linking) |
| Abstract: | "Donor-Acceptor systems are highly appreciated in the field of organic memory devices due to their efficient charge transport within the systems. In this work, we have designed and synthesized a D-pi-A system constituting ester-flanked quinolines and functionalized triarylamines (TAA) through a single-step cross-coupling reaction to fabricate memory devices via Write-Once Read-Many times (WORM) non-volatile memory. Structure-property relationships are reconnoitered for these conjugated D-pi-A systems through a series of UV, fluorescence, XRD, DFT, and memory characterizations. The UV and CV data show efficient charge transfer with intramolecular charge transfer occurring at 407-417 nm and a short band gap of 2.56-2.65 eV. An enhancement in the resistive switching behavior of the memory devices is observed for the compounds with simple TAA-quinoline and tert-butylphenyl substituted TAA and fluorophenyl substituted quinoline due to balanced charge distribution in the compounds. This enhanced switching induces an on/off ratio of 10(3) by generating a highly ordered arrangement in the thin films. The HOMO, LUMO levels, and the ESP images together estimate a charge transfer and charge trapping as the plausible mechanism for the solution-processable WORM memory devices. The longer retention time (10(3) s) and lower threshold voltages (-1.21--2.12 V) of the devices makes them intriguing compounds for memory applications" |
| Keywords: | D-pi-A systems WORM memory intramolecular charge transfer quinoline triarylamine; |
| Notes: | "PubMed-not-MEDLINEAngela, Varghese M Harshini, Deivendran Anjali, Anshika Imran, Predhanekar M Bhuvanesh, Nattamai S P Nagarajan, Samuthira eng Germany 2022/11/18 Chemistry. 2023 Feb 7; 29(8):e202202569. doi: 10.1002/chem.202202569. Epub 2022 Dec 27" |
